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I have been approached to buy an LS6 block, crank, and heads. The price is waay sweet. But you know how that goes.
It is supposed to be out of a Z06 from the 02-03 era.
what should i look for to make sure it is what he claims (casting numbers?). My luck i will buy it only to find out its an ls1 or some pickup truck motor.
Where should i be looking for damage (cracks etc)?
If that's the case I'd focus on getting a complete 5.3 truck engine minus intake. Put on an LS1/6 intake and use that. Very cheap and 300hp, swap in a little cam while its on the ground.
Putting an engine together can be a challenging and expensive. I'd focus on staying simple and cost effective.