you guys are answering my questions before I even ask 'em...maybe you can help with one big overall question. I have 3 low mile engine options any would be backed up by T-56...I have a 93 C-1500 4.3L non vortec w/5spd manual now. I have a LS1 or LT1 or 4.3l Marine vortec long block...seems the LS1 is the most popular but I don't own it. I can buy it and the T-56 together w/zo6 intake complete with EVERYTHING except exhaust manf and accessories. for $3500. It seems from the posts I've read the LS1 is really the cheaper more valued swap....problem is I own the 4,3 and a good T-56....but need all the induction and ignition for it...vs exhaust and accessories plus purchase the LS1.....HELP! Ken