well im on the verge of getting a 427 ls6 short block, i was wondering if i can use my rear and front covers from my existin ls1 and the rest of the accesorys, well im getting new heads and cam and ls6 oil pump and a fast intake and tb, but the rest is going to be reused off my existin ls1 block if i can anyone on plz help on telling on what is compatible

 

LS1 parts are interchangeable w/LS6 parts from 98-2002. I am currently swapping from an LS1 to an LS6 block & re-using the front & rear covers. Am re-using heads, cam, intake, & accessories. You will need new gaskets....etc.. I would also suggest using the LS6 timing set. What is described here is a 346 LS1/LS6 swap. Don't know what a 427 LS6 block is. If you are describing an LS7 block, then parts are not interchangeable.

 

well the only things that arent interchangeable are the heads and rotating assembly but i got

 

The blocks only have slight differences. Our 02 WS.6 has an LS6 block in it from the factory. Had an LS6 Clutch as well.