I'd be all over those LS6 parts for $500.00 You can use all the Corvette parts on a 5.3L block. The heads by themselves are worth $500.00 if they are LS6. The intake used is worth $300-$350. I like the LS1/LS6 look so I'd be installing all the parts to make it look like the LS6. I'd sell the heads just to offset the cost. Put them babies on Ebay and pocket the $500.