Same deal as my truck.

I have seen a 3.4 in an '82, done by Irbis Offroad in Colorado. Really the same as a later truck.

The hood space can be made up by a 1" body lift and slight hood trimming, plus a Suby hood scoop. Mine really did not require any trimming nor the scoop, just the 1" BL, but what the hey.

The Front Range Off Road Fab crossmember added to the simplicity of doing this. You will need to fab, or buy custom, the motor mounts. Mike R&Rd the motor maybe 6 times to get it perfect. That was without the BL, which would make things infinitely easier.