Ok, looking for some opinions here. I have a relatively stock mint condition (not a spec of rust anywhere) 1990 K5 with 173,000 miles on the original FI 350. I am bored and need a project. I am looking at taking two routes for the project, main problem is of course money (us military guys don't make that much). My overall plan is to replace the 350 with a 383 from GM performance parts, hook it up with a performer intake and thorley headers. That will cost me over $4000 in parts I am predicting, the labor I'll do myself. Can I instead, bolt a performer intake and thorley headers onto my existing engine for now and then in a year or so when I have the funds transfer these same parts to the new 383? Will they bolt right up or will I have to buy new ones? If I can do this, what can I expect in terms of increases in power/fuel mileage on the old engine? I just don't want to do things twice, and I really can't afford the new engine right now but this great weather up here has me itching to start a project. As usual thanks alot.