I didn't read all the posts in this thread, but a properly built 455 Pontiac will hold their own against a similar LS engine. A lot of folks get confused because you can find a low mile LS engine in the scrap yard at a good price and get good performance for cheap.... This is nothing new. In the 60's folks with 389's did the same with 421's and the 70's the same was done with hi-compression 400's or round port 455's to replace anemic low compression smog engines.
At higher power levels the LS costs money to make big power just like a 4.6 Ford or anything else out there.
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