You can check out my build (link in sig) i just gathered over the counter parts and threw it all together in about a month.
I got my mounts from West coast fiero
I got my harness from Phonedawgs
I made my own pass side axle for the HD auto tans
I made a super simple single 3" exhaust
I re routed my Belts to delete the P/S pump and left the Alternator up high to keep things simple
The one thin I can't stress enough I probably spent over $1,000 at various auto parts stores for purely miscellaneous parts like hose, hose clamps, wire, CV boot straps, heat shrink tubing, fluids, filters, belts, bolts, paint there are so many little $2 or $4 things you need to button it all up.
1986 SE 3800SC/4t65eHD (firstname.lastname@example.org)
HX-40, FrozenBoost I/C, 80lb injectors & E85 Coming soon.....