95TAMaddog

Is there a difference between an 1988 350 block and an LT-1 block. Can it be used for an Lt-1. Just wondering. Thanks in advance.

Hughey

1BadBrd

LT1's block have different coolant route. LT1's are reverse coolant.

Injuneer

The entire front end of the LT1 block is different from the earlier Gen 1 SBC engines. Different water pump configuration, a "pocket" for the Optispark distributor, resulting different timing cover. If you put your Gen 1 block in an LT1, you have to either use the Gen 1 heads, or have the LT1 heads converted to the reverse flow cooling passages. Then you would have no way to feed your LT1 PCM without the Opti, or developing a system to provide the Opti high- and low-res signals to the PCM. The LT1 PCM can not function without the low-res pulse. You would require a distributor to be installed, or conversion to an aftermarket bank-to-bank ECU.

Some info and photos:

http://www.automotiverebuilder.com/ar/ar99928.htm