Does anyone know where (on the net) I can find info about what blocks GM has used for what engines and all compatibilities between such?
Basically I want to know what Engines share the same blocks (not v8's though).
Well, for V6's, the 2.8 and 3.1 share the same block, of course, as well as the new 3100. The 3.4 OHV is similar, as it is also a 60 deg V6, but the block is slightly different to accomodate the larger bore. The 3.8 Switched to a 90 deg layout, which is more similar to the 5.7L V8 in configuration, so the block is totally different there