300 hp 327 with 2bbl intake? WTF?

That was my first thought. Second thought is that if it is a 327 long block some previous owner swapped intake and valve covers for some reason or another. Guys pulled four barrels off all the time and stuck two barrels on with the intention of getting better gas mileage. Or someone may have swapped carbs, intakes and valve covers between two cars he owned at some time.
Casting number and suffix number on the block will tell the tale.

 

Mart3406, You made my day with the old urban myths about cars that "really" existed! I love a good laugh. But did you have to ruin my day ? I thought the 010 deal was real! I spent alot of money buying two sbc's that were 010s last fall. Damn You Mart3406 !!!!!!! Normal Norman

 

---------------
Relax! Don't sweat it! While a "010"
casting mark certainly doesn't signify
these things, it also doesn't absolutely
rule out the possibility - however slight
and completely improbable - of your
particular blocks having been cast
with a "higher unobtanium content"
or that they somehow could have
been personally blessed at the factory
by either Smokey Yunick and/or by Bill
Jenkins!

Mart3406
==============

 

My bosses wife has an original condition '63 SS, documented, numbers matching, TWO BARREL.

 

As said before SS was a trim package not a performance package

 

Been about 40 years since I worked on a SBC but I remember something like these on the exhaust bolts, originally.

 

Its not an old wives tale. People just get the casting number confused with the high nickle identifier.

A BLOCK CASTING NUMBER ending in 010 just means it is a 4" bore medium journal heavy casting small block chevy made from 1969-79.

An 010 casting number UNDER THE TIMING COVER means it was cast with an extra .1% nickle. An 020 means .2% extra nickle. A pair of numbers under the timing cover
means both high nickle and extra tin to make it pour better with the extra nickle. This is on all SBC's, and you can hear the difference when boring the high nickle blocks harder iron. It makes the cutter sing a higher note.

 

That must mean I have the super ultra rare race only "oh ten" "oh twenty" blocks

 

True in 63, not true universally

 

327's were available with a 2bbl carb and they were rated at 210hp. The '67 Camaro that I built my drag car out of had one and a 3spd on the column.

Frank

 

I had a 65 SS Impala convert bucket seat and console interior that was a 283 w/three on the tree. That was in the 60's and it was all OE. Show me the proof that SS wasn't a trim package

 

---------
Yep, there were lots of mid and late
'60's 210 hp 2-bbl 327's. In '69, that
even became the base V8 engine in
the Impala, replacing the previous
1968-model year' 307 as the V8
Impala base engine.

Mart3406
===========

 

As requested 1961 Impala Super Sport RPO 240 Supplement

 

The 69 327 2bbl was rated 235 HP, it did indeed replace the 307 2bbl as base V8 for that model year.

 

I found out that is true, when I was stumped about a part on my car.
I have a '69 GTO convertible with a correct year carb., but what's unusual is that it says "Rochester, by Carter" and no identifying serial numbers on the housing.

 

GM didn't want to have a single source for Q-Jets (in case a single plant strike could stop production) so they had Carter build some.

They looked a little more "gray" and in my experience had more problems with main well leaks and inlet nut thread deterioration, that's "in my experience".

Hoop

 

Are you aware that a 61 SS is a very special animal? The following is from Impala Classics.com

The big news for '61 was the mid-year introduction of the Super Sport model and the new monster 409ci engine. These two new entries to the Impala lineup were an instant success! Factory production numbers for the new "SS" for 1961 are approx 453 units; with approx 142* of these featuring the new Turbo Fire 409ci engine. Although the Super Sport 409 package was available on any Impala it is unlikely it appeared in anything but sport coupes and convertibles.


Look at the followinging years


In 1962 the option of the Super Sport was available on only the two-door coupe and convertible. However, the SS models in 1962 could have any engine from the standard 235 ci six to the 409 big block V-8. (Impala SS engine options included the 235ci 135hp I-6, 283ci 170hp V-8, 327ci 250 V-8, 327ci 300 V-8, 409ci 380hp V-8 and the 409ci 409hp V-8.) Horsepower ratings on the 409 ci V-8’s were upped to 380 on the single four barrel and 409 on the 2 x 4 barrel. The heavy duty mechanical items of the 1961 Super Sport option (HD springs, shocks, brake linings, etc.) were deleted in 1962, though they were available optionally. Chevrolet increased production of the 409 and made it available in all full size Chevy's - Biscaynes, Bel Airs, and Impalas. The Impala Sport Coupe came with a ribbed rear roof line and a smaller back window to mimic the look of a cloth convertible top. The Impala's were a bit less aerodynamic this year, which made some racers turn to the lighter and slicker Bel Air coupe. The biggest change from 1961 was that the front bucket seats with a short console between became a part of the SS package in 1962.


More from Impala Classics

In 1964 very little changed in the Impala line. The new body style lead to a more rounded softer look. The big full size Impala line was once again being marketed as "Jet Smooth!" The roof line for 1964 was the same as it had been for 1963. In 1964 you could order a vinyl top option (RPO C08) on any solid exterior color sport coupe. Combined with the ribbed roofline styling this option made the sport coupe look very much like a convertible. The "SS" Impala continued to feature the engine-turned swirl pattern aluminum trim. The Impala four-door sedan remained the mainstay of the Impala line.1964 Impala production was 889,000 units with 185,523 of those being the Super Sport Impalas. It didn't happen often but the Impala or the Impala Super Sport could be ordered with the standard 6-cylinder engine.

Nuff said? I didn't list 63 because of you thinking it was a special year. it wasn't. I think you can understand that the 6 cyl is by no means a performance motor

 

And the 69 SS was only available as a 427 Z24, so to say that an SS was only a trim option was true in some years, not true in others, so not "universally true, that's all

Hoop

 

Yep, that carb. has been very problematic and went through it many times to get it working properly, including fixing what you have mentioned. Still not satisfied with it, now will be looking for a aftermarket replacement.

 

I think you have the 7040264, look for a 7040262, it's a RR (Real Rochester)

 

There were other cases where SS was a HP, like Camaro. But I believe, as stated, in '63 it was a trim designation.

 

Okay here we go: You could get ANY engine from a 230 cubic inch 6 cylinder to a 409 425 horsepower engine in ANY BODY STYLE full size Chevrolet in 1963. It is NOT uncommon to se 283 SS cars and in Canada not uncommon to see a 6 cylinder SS car. By the way not that it means anything because they could have been changed but the fender badges indicate its a 283 car.

AND-you could not get a factory 4 speed with a 283 and of course a 6 cylinder-just the 327 and 409 cars could get a 4 speed.

 

F0627DE
F= Flint, Mich.
06 = Jun
27 = day of the month
DE = 283 or 307 depending on the casting date. Need that to finalize.....
casting date on the rear of block to the passenger side above bellhousing surface.
My money is on 283.

 

The real anomaly is a 283 with a 4 speed I think.

The M21 shows to be available on "All" but the A 283 is 3 speed or OD only?

 

An 010 casting number UNDER THE TIMING COVER means it was cast with an extra .1% nickle. An 020 means .2% extra nickle. A pair of numbers under the timing cover
means both high nickle and extra tin to make it pour better with the extra nickle. This is on all SBC's, and you can hear the difference when boring the high nickle blocks harder iron. It makes the cutter sing a higher note.

This is catagorically wrong. The 010 or the 020 number under the timing cover is the core assembly number for the block cores. The G core was the front and the 305 (020) and 350 (010) used the same front core. If you look at the back it also has both numbers, that was the H core. The numbers have nothing to do with the iron chemistry.

 

Badges, engines,transmissions, interior, that can all be changed, especially given 50 years to do it. It could have been a real ss with a 283 that some PO put a 4 speed in, it could have been a 327 4 speed car that Someone somewhere along the way stole the motor from and a later guy slapped a 283 and badges in. Hell, it could be a regular impala that someone made a SS "clone" out of with swap meet parts, hence the badges and 283 coupled to the four speed. Either way it's clean as hell and I would enjoy cruising in it...


Posted from the TJJ App for iPhone & iPad

 

I had a small block in an o/t car and was told it was a 327 ...just a dumb kid then, I was all excited until I took it to the machine shop. Turned out to be a 283 .125 over making it a 301,which was a popular thing to do back in the day. Sellers lie, buyers lie, only the numbers tell the truth.Any way you look at it though, you got a nice car !

 

Sorry to quote myself but should the car in the OP's post have these? I don't see them.

 

I used to own a '64 Chevy II Nova SS. It had a 283, double-hump heads, 2 spd Powerglide and the stock 2 barrel carb.
I was the 3rd owner and it was a low mileage, pretty original car.

 

That is for 61 only. Starting in 62, the buyer could chose any motor/trans combo. So the buyer could buy a Impala SS with a Straight six and a 3 on the tree or a low model Biscayne with a 409. In other words, no "mandatory options" like 61 S.S Impalas, which are rare (of course, now days, there are more S.S. Chevys out there than Chevrolet ever made, and they all have the hottest engines.)