the 302 is 302 cubic inches, the 305 is 305 cubic inches, and the 350 is 350 cubic inches. the ford 302 has a 4inch bore just like a chevy 350, but the ford uses a 3inch stroke as compared to the chevy's 3.48 inch stroke. the 305 and 350 both have the same stroke, but the 305 has much smaller bores.
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