Honestly lb for lb theres not a ton of difference in times at the track, for instance a stock 97 LT1 camaro might run 13.7-13.9@100mph and a 98 LS1 camaro might run 13.5@102, in the end theres not really a ton of difference in the final performance number so if you think 2 tenthswas going to be a big deal it really isn't lol.
Now for anyone out there that is thinking of flaming me and going to say there are stock 12 LS1's your correct but are few & far between, my 98 ran 13.5@103 with a lid & catback and most you'll find in stock form are in the mid 13's. My near stock 94 LT1 formula ran 13.7@100mph so the comparison is a valid one.
Now back to the issue at hand, ls1's have gotten TONS more aftermarket support than LT1's & therefore IMO have a much broader range of things you can do, not to mention cam shaft swaps are a sinch, tuning options are a dime a dozen, etc. oh and did I mention LS1's don't have an opticrap? In the end an LS1 is the way to go if you have the little extra cash just because of all the future possibilities.
-Bill
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