Honestly, i think youve got the wrong car if you cant do the work yourself. I mean, if youve got a buddy with a shop, and he could help you out, thatd be one thing. But to bring go-fast stuff into a shop to have them install a new H/C/I/E or something would cost a fortune.
If it were me - since im mechanically inclined - I'd go buy $1000 of tools and an explorer engine. Use whatevers left for the gaskets, oil filter + oil, and other BS. LEARN TO DO IT YOURSELF
If youre not mechanically inclined - sell it and get a 4.6???