Ron Miller

Looking for info on a small block 350 cu in engine in the '66 Vette I'm currently driving. I purchased the engine rebuilt from Conlee Rebuilding service in Memphis back in 1993. It's supposed to have hyper eutectic pistons and a Comp cam, as I recall.

The photo below is the only readily visible number I see, but should be enough to identify the engine, I think. I'm interpreting the number to be T0626CMJ, and am guessing based on my limited knowledge that it's probably a Tonowanda engine built June 26, and the last three I'm guessing to be C?MJ. I thought the CMJ would translate to a 1974 police engine, but there are guys out there a lot more knowledgeable than I

I apologize for the upside down, but I've put this in right side up and upside down both, and it insists on making them all upside down . . . . I'll figure that out later . . . . .

My real question is in relation to upgrades for this engine. I'm planning on replacing the heads with Summit Racing® Cast Iron Cylinder Heads for Small Chevy SUM-152123, and am wondering if I can use the old Edelbrock C4B aluminum intake (has the oil fill tube going into the engine block) with this combination, or if I'll have to go to a later intake manifold. I also plan on sticking with the original cast iron exhaust manifolds, no headers.

Advice and suggestions appreciated, just want a good daily driver with minimual $ outlay on my part.

Thanks!!

MelWff

CMJ was also used in 1980 for a 305, need the casting number. This link may help you in finding it
http://www.mortec.com/location.htm

Bluestripe67

If you can post the casting number from the back of the block, it would help. I did find CMJ as a 305, 1980 Camaro and 1974 350 police. Dennis

Ron Miller

Thanks, I'll try and locate and post the casting number, although I'm sure this is a 350, not a 305.

Ron Miller

Sorry, I'm just not gonna be able to come up with the numbers very easily. The car has a PG tranny, and I think I remember that the kickdown lever bracket covers the numbers on the left side of the engine, and I'm having no success in getting to the numbers on the right rear side. However, I'm certain that it's a 350, I purchased it as such after discussion with the rebuilder, the invoice I have is for a 350 cubic inch bored 0.030" over with 260 Comp cam and hyper eutectic pistons. I don't believe there's a chance that it's a 305.

Accepting as fact that it's a 350, how does that leave the answer to my question regarding the C4B intake, etc.?

JohnZ

Any small-block externals will bolt up to just about any block with no issues (until you get to the really late Vortec stuff when they started changing bolt hole directions and locations); prior to that, "anything pretty much works with anything".

Nowhere Man

By 1980 didn't the stamp pads get smaller?

JohnZ

Yes, but that didn't affect what heads or intakes would fit.

Ron Miller

I thought I remembered something about the later model 350's not having provisions for the oil filler tube or for the crankcase pcv return in the block, am I remembering correctly? The C4B manifold has provisions/allowances for both, will the 350 block accommodate these?

desertpilgrim

Why not ask the guys you're buying the heads from?

Nowhere Man

well in his case that would help determine if its a 305 from 1980 or the
350 from 1974 based on the suffix code

JohnZ

Any year block will accommodate the front oil fill tube setup; 1968-up blocks all lack the rear crankcase vent hole, as both ends of the PCV system were moved to the valve covers.

Ron Miller

Thanks John, I believe that's the answer I was looking for. So since I won't be able to run the original cast valve covers without punching a hole or holes in them, it really won't matter if I do or don't have the oil fill tube as original or if I use the oil fill hole in the later model valve covers per later model engines. But it would sound as if I run the C4B with this setup that I would either need to retain the oil fill tube for air intake to the crankcase or plug it and use the air intake on the valve cover, along with the PCV fitting into the valve cover as well.

I suppose one might drill a later model block at the proper location at the rear to accommodate the PCV line, but I'm not going there . . . . .