chevy 4.3 V8?! question

i found an old derelict 75 monza with a 4.3 V8 (at least that what the fender tags claim) with an oddball factory stock fuel supply setup. no room in the ch***is for a mechanical pump so its got an electric pump instead. the mounting boss on the block has a plate over it. my question is, does anybody know if the cam in these motors has the fuel pump lobe or am i gonna need to replace the cam to put a mech. pump on this critter? i'm that close to havin a runnin motor in my old T roadster... HELP!!! puh-leeeease!

 

I'm not an expert on this but 75 was still old style carbs, not EFI. So all the other cars that engine would go in would have had a mechanical pump. I would think the lobe is there. Maybe even the push rod, if you are lucky.

What the hell is 4.3 in English?

 

Four point three

 

262 cubic inches.

 

262 c.i.d...... i think

 

I don't remember ever noticing any difference. The cam would have been made from blanks made for any other SBC, so I expect it has the lobe in there. Even if it doesn't, an electric pump isn't a big deal. Put it on the frame rail, out of sight. Great little motors.

 

262 cid.

I don't know but if I had to guess I would say it has the same cam as any other SBC. I can't imagine they would make a special one for that engine in that ch***is.

Jay

 

nope, no pushrod but that was easy to scrounge! im hopin youre right though. i mean why use a "special" lobesess cam for that 1 ch***is right? then again, it IS chevy and they DID call it a 4.3 instead of usin cubic inches.... says so right on there on the fender man..

 

man you guys even type FAST!!.. thanks for all the input. gonna mount a pump, stab a distributor and hopefully scare the neighbors today!! thanks again and im sure i'll be back with more stupid questions soon

 

Wait i thought the 4.3 was a v6?

 

The cam does have the lobe...install the pump and be happy. Be aware that the 262 is an oddball, but normal 1st- gen SBC performance parts like intake manifolds do fit it. However, I wouldn't go much farther with it...it has a 3.1" stroke and only a 3.67" bore, so it has a lot of valve shrouding, and there's not much you can do about it. Should work well enough in a lightweight car, though.

cavi: there is also a 4.3 V6, different animal.

 

that's funny right there...I dont care who you are

 

it is now but frankly, the thought ov a v6 offends my delicate sensibilities! i guess chevy was tryin everything in the 70s to increase mileage while keepin the V8... this is the 1st i've ever seen but with 40,000 miles on it, i'm usin it and gladly... it was FREE!!!

 

The Monza was basically a Vega, and the 262 was made so (a) GM could say "it has a v8" and (b) smog-legal. The hot sleeper back in the day was this car with a hot 350 swapped in. But you had to loosen the motor mounts to change the back spark plug!

The motor is basically **** from the factory, but will wake up as others have said, and in a light car would get great mileage.

 

I had one of those with the 4 speed. I thinjk the 75 was ok for swapping plugs and the 76 you had to jack the engine for the rear plug. With a decent intake and a 500 cfm carb tuned right, it should run good for a 262 and get good mpg. If I remember right, mine got around 25 and was a blast to drive

 

Soooo, whatcha doin with the rest of the Monza?

 

They also had shallow oil pans also, that would be good for a lowered car. I had one and it had every factory acc. I wanted to use the shallow pan and check out the oil pump and pickup, but sold the motor before getting the time to check it out.

 

They all got the same cam, there is a lobe for the pump!

 

262 V8 is a 3.5" bore 305/350 GM also made a 267ci SBC, 305 bore (3.736") and a 3.1" stroke, they did all sorts of things in the '70s.

 

There is also a 267" small block in early 90's Caprice sedans.............. also known as 4.3 I believe........nothing wrong wth any of these for the right application. It's just that many people realize you can get up to 400" in the same space and very little increase in weight.....so the lil' ones get no respect......but I think there is something to be said for "proportionality".............use it and enjoy it!

Ray

 

262, thank you... I am a pre-metrically semi-educated old fart.


"it has a 3.1" stroke and only a 3.67" bore,"

A 265 is 3.0 x 3.75

.080 difference in bore, .040 on each side, so not much more shrouding than the 265 would be. 265 PP heads would look good on that.


'"

 

the rest of the monza is sittin in a field in glade park colorado... but its gutted of anything useful and bein a monza, i think its fulfilling its destiny.

 

i DID sell the frame stands, motor mounts, dash insert and marker lights to a kid in omaha ... grew up in the midwest so i can sympathize with the poor *******s tryin to resurrect old cars when they can actually HEAR em rustin!!

 

The 4.3 V-8's are great for a beater. dress them with leftover 350 parts,a new timimg chain and let them twist. I had one in a elky with 3.73 gears.made gas and ran like a striped *** ape. Most people cam a 350,leave 2.73 or taller gears in. Those are the dumb***es you can embar*** with one of these giveaway motors with a gear.

 

Heres a 4.3 for ya

 

I bought a new Impala station wagon in 1983 with a 4.3 V8 in it..it would not get out of its own way but got good gas milage...27 mpg highway...got rid of it after about 6 mos.

 

I wonder if the small valve 305 Vortec heads will work on these little small bore engines. They pop up on ebay fairly regularly and usually go cheaper than the big valve 5.7 versions. I tend to think you would want to err' on the conservative side when hopping one up, smaller valves smaller carbs.
Scott M.

 

motors low milage an its free ? cant beat that with the bargain stick id put it in a roadster to , should be a fun mill

 

yup, cutdown phaeton T body of undetermined vintage with a 4 speed... just like henry intended!? idunno how much it weighs but as a rollin ch***is, me and a friend could pick it up to move it around before the drivetrain went in!

 

Those little L99 4.3 Caprice V-8 engines from the early '90's have a large journal 3.0" stroke crankshaft which can be installed in a early '90's 350 block with a 4.0" bore... That's one cool combo!!