So, I've got a 99 k2500 suburban that I swapped a hot 5.3 in, well I sold the 5.3 and decided I want to go big block. So I'm hunting a L29 454 with harness and ecm to make it plug and play that I'll 411 convert so I can tune it better. Blah blah, so I'm trying to find long tube headers that have...