I am ready to rebuild but was wondering which would be better. Rebuild the '93 LT1 that is in it or build a '95 LT1 block I can get from a friend for $75 with about 32,000 on the clock. What all would need to be changed to make the '95 work in an auto equipped "93 Z?

 

If you're just building a new motor out of the 95 block and dropping it in, nothing needs to be changed. An LT1 is an LT1. The accessories attached may be slightly different, but if you use everything (sensors, intake, fuel rails, ect) from your 93, the other one will drop right in.

 

Would it be better to use the internals of the 93 or 95? Is there even a difference? I am going with the LT4 kit (LT4 hot cam, LT4 intake, LT4 heads) 52mm TB, 30lb injectors, long tube headers and custom chip