I will need to replace the tired 400 in my '87 /forums/images/graemlins/burb.gif pretty soon. Since I tow with it, I want to go 454. I have never done a swap that involves a TBI and/or computers so I am looking for information on what I need to do. I'd like to swap in a vortec 454, but I don't know if I'll have the $$ for that. basically, I am doing the research now for future reference so I only have to spend money once to get what I want, and not have to pay for my mistakes as I go. Here is what I currently have in the '87 /forums/images/graemlins/burb.gif TBI 400 700-R4 tranny (less than 3000 on a fresh rebuild to hold up to a BB) NP 208 t-case 10b front/rear (1/2 ton /forums/images/graemlins/frown.gif Will be going 1 ton if I go big block) I want to keep all the factory options (cruise/air cond.) since this is what we go on vacation with. Can anybody help point me in the right direction here? Thanks!