I just purchased a 5.3L. Was a great deal locally so I couldn't pass it up. Well I almost did, and wish I had, but whatever, I didn't. Anyway, I have 2 options for it. Either put it in the 1969 Firebird sitting in the driveway, or my 1997 C2500 pickup. The engine in my C2500 is a 5.7L Vortec engine, with a cold rod knock. Would be a good base for an engine build for the Firebird as well. The wonder is, would the 5.3L be a decent base for my 97 which is intended to be a tow rig? Or should I hop it up and throw it in the Firebird and have some fun and show off at car shows?