[RocktimusPryme]

Originally Posted by JLMounce

You can start comparing these things all day and if you do the same. Junk Yard LS, or you find a used 400/455. Machining costs will be nominal. Everything you have to buy for the pontiac, you have to buy for the LS.

Every time I've ever looked at it, it's six one way, half a dozen the other.

This is where our disagreement is though. I DONT think you have to do all the same things to the newer shortblocks. You can, and its better to do so, I wouldn't argue that. But also, I think there is enough evidence of dudes running factory short blocks now that it wouldn't bother me that much to do the same thing.

I would feel at least marginally confident just re-ringing a used LS block. Maybe bearings. But otherwise all OEM parts. I wouldn't feel the same about a junkyard 400. You are always gambling with used parts, but I think the gamble is way less with a newer motor.