Lt4
There are 2 LT1 blocks, 1 being the 2-Bolt main LT1 block (used in the LT1 F-Bodies and Impalas), the other being the 4-Bolt main LT1 block (as used in the LT1 Corvettes, and various LT4 cars). They also all share the same 10125327 casting number. So really, there is no such thing as an...