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55 Chevy · 01-09-2019, 05:32 PM

The block I run in mine is a 3720991(1956 number) but it has the neoprene rear main seal so it must have been a service replacement unit. No side mounts.

The '57 265 is a 3731548 and the number on the passenger side(on the pad in front of the head) can be either a "C,CD or CE". Mine is a "CD" which I believe meant it came with a 3 speed overdrive manual transmission. The car it came out was a 2 door wagon.
I think "CE" meant heavy duty clutch.

I call it a "Poor Man's" Bow Tie block.

Crank is part #3735236.

None of the 265's I own have side mounts.

01-09-2019, 05:32 PM	#16
55 Chevy Member Join Date: Feb 2008 Location: Calgary,Alberta area Posts: 221 Likes: 15 Liked 12 Times in 11 Posts	Re: Attn. 265 Racers.What block is the best? The block I run in mine is a 3720991(1956 number) but it has the neoprene rear main seal so it must have been a service replacement unit. No side mounts. The '57 265 is a 3731548 and the number on the passenger side(on the pad in front of the head) can be either a "C,CD or CE". Mine is a "CD" which I believe meant it came with a 3 speed overdrive manual transmission. The car it came out was a 2 door wagon. I think "CE" meant heavy duty clutch. I call it a "Poor Man's" Bow Tie block. Crank is part #3735236. None of the 265's I own have side mounts. Last edited by 55 Chevy; 01-09-2019 at 05:33 PM. Reason: Bad Grammar