the K5 has a tired 400, runs strong, just old I like the idea of a 383, saving the $$$ for that or 39.5's the TBI is stock and complete off a '87 k20 Should i put it on my 400 or save and put on a 383? Will the computer in the TBI handle the 400 or 383 or just go for a 350 stock replacement Any help, suggestions, things you heard on a psychic network, etc. appreciated a always. -zakk '77 1-Ton K5 CK5's MOAB 2002 OR BUST!!