Quote:
Originally Posted by Nostril Cheese
Small/big blocks usually refers to two GM engine families that use a basic block architecture.
The small block uses the same block from displacements from 262 to 400 cubic inches.
The big block uses a larger block from 396 to 572 cubic inches.
A big block 350 may be referring to the 348 engine in the late 50's. Other than that, im not sure what they are referring to.
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I believe the 348 and 409 were considered big blocks (but not directly related to the 396, 427, 454, etc...), and I think there may have been a 366 big block used in trucks as well.
I think Chevy may have come out with a new small block that's actually a 427, that they used in some of the newer corvettes.
Big and Small do seem to be mostly used when refering to Chevy engines, but I believe other manufacturers also had big and small blocks as well.
IIRC, the old school Chevy motors were
small block 262, 265, 267, 283, 302, 305, 307, 327, 350, 400
Big block (348 and 409) 366. 396 (402), 427, 454. I believe there was also a special 427 made in low numbers, and the 502 was never put in any car from the factory, but I think was out as a crate motor in the 80s/90s. I actually think that there were some other big blocks, but I think they were mostly used in buses, large trucks, etc...