[D13]

Turbo package will not clear A/C box in a factory square.
Turbo motors use different injectors, lines, and injector pump.

I get 22+ MPG in my 87 C10 with 6.2 and 700R4, with at least 1 bad cylinder.

Just think of it as a low revving 305 and drive accordingly.

If you keep the TH400 you just need the vacuum control on the side of the injection pump. IF you go to a 700R4 it has a kind of complex linkage that is best robbed off a donor. In fact, the easiest way to do the swap is to find a rotten donor truck and just swap parts.