Technical 327 motor and gearbox, bellhousing Identification

Hi everyone I bought a 1960 El camino a couple of years ago off a car dealer in California the car was described as having a corvette 327 (all 327's come out of a corvette apparently lol especially when they have the Corvette valve covers) I finally got to working on it and thought I would decode the numbers the motor has casting numbers 3914660 cannot read the stamped number as it looks like the motor has been decked at some stage and its been machined off.
The intake has the code 3905393 the bellhousing has the code 3858403 from what i can gather its just a standard 1967 327 is there any chance it could have come from a corvette not a big deal as I got a good deal on the car and I knew it was most likely not a corvette motor. I would like to know what it is though.
Also does anybody know what size the bellhousing is as I need to buy a dust cover for it, also is the 3 speed just a 1960 standard transmission? Thanks in advance

 

The block ending in 660 is a late '67 casting for a '68 model year...the intake is a '67 model...no way to know at this point what the motor was originally until you start taking it apart..and that assumes the innards are stock. The 403 bellhousing is for a 10.5" clutch/flywheel...the transmission is an early deal...im not too savvy on those...but looks like a 55 or so to early/mid 60s Saginaw trans...

 

That's not a Saginaw trans. Its a 318 Muncie. used fron 55 until about 64 in cars & 68 in trucks. I know a guy who worked at the corvette assembly plant in St Louis. He claims that they ran short on engines at the corvette assembly line and they brought a semi load of engines over from the truck plant. that was in the 1980,s. He stated that it was imperative that the line not be stopped no matter what.

 

Look at the casting date codes, also. The letter, followed by two to four numbers. I can't make out what it is on the transmission, but it's right there, below the casting number. xx9 ?

the last number is the last digit of the year.

 

Thanks everyone very helpful will look at the date code on the transmission is it also possible they used the stock transmission from the El camino and mated it to the bellhousing the car was originally a 6 cylinder I will check the date code. I would assume the transmission and stock rear end will not be to strong

 

Yes, it is a Munice. I have been told they were used in some 65-66 Impalas. I have never be able to confirm this.

I am running this transmission behind the 261 in my 53 Chevrolet 150.

 

Since the car was originally a "6", then the motor could be assembled parts and not a complete motor from a donor car. So it might be that all the numbers don't match to one year or body type. As for the tranny and rear, how strong it is depends on how hard you drive it. I don't see you powershifting a column shift, I think you will be fine.

 

I bought a '65 Belair with the little Muncie. Looked like it was native to the car.

 

pretty sure the last two years 65-66 of the Muncie three speed, they made some changes to things like the output shaft spline, gear helix angles, etc. They were used in lots of pickup trucks, too.

 

Hello. Longtime looker . Original sign in won't go through. From Oregon here. No disrespect but Muncie 3 speed trans were in late 60s/early 70s Gms .

 

The non synchro low three speed was also made by Muncie.

 

FWIW I recall a 69 or 70-ish Nova with a 307, factory 3sp floor shift w/Muncie shifter. I speculate the trans was too?

 

Hello. Just to clarify, I had one from a 1969 Chevelle with the Muncie shifter and one of my books tells about these trans being in the Chevelle , Monte Carlo, etc. I have learned A LOT from reading squirrels replies and buy no shape or fashion iam i in his league of knowledge

 

Not "buy" but "by"

 

Yes they made two versions of the Muncie trans. the early 318 and 319 where non syncro in low and reverse and had a 4 bolt side cover. the later full syncro Muncie was a larger trans.

 

It's a Muncie 318 transmission like already mentioned, but it's the "short" version, meaning it was for the "X" frame, full size cars, 58-64. I've seen claims the short version was also used in "some" trucks, but I have no idea if that's true.
I am Butch/56sedandelivery.

 

every V8 Chevy was from a Corvette - need a lot more than valve covers - put a Comp Cams hydraulic Thumper cam to give it the Corvette style kick

 

1964 65 and 66 trucks used the short 318 trans. The truck trans has threads in the bottom mounting flanges. and the rear casting for the trans mount on the tail housing isn't drilled or tapped.