James, you can ask my friend Mike Scano who is not only knowledgeable about LS motors, he actually invented a tool to lock out the variable timing to check valve clearance properly. You might want to Pm him on this forum: http://www.lidragracing.com/showthread.php?1950-98-Camaro-Street-StripDoes anybody run a LS based motor in there car. I'm leaning toward a 5.3 truck motor with a super t10 tranny behind it. I think the only downfall is I will have to make or have made the fenderwell headers for my 55 chevy. Opinions anyone, Thanks.