Re: Small block big block discussion @ work
MODULAR BLOCK is the design of the motor, A 4.6 is small and 5.4 is big, taller deck height.
Big block/ small block refers to the cubic inch of the motor, in the Day 350 c.i. was the dividing line. There was not alot of stroking back then. when Chevy guys started to stroke small blocks to 400 c.i. Most people used the original design of the motor as the guide to it's class. All the small winsor ford motors, 260,289,302 were small blocks, and the Y blocks 352, 390, 427,460 were all big blocks.
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