you seem to have selected your t case and tranny set up so here is my 2 cents on the 350 engine ideal . im giong to put a 350 tuned port injection in my truck because the tpi set up has very good low end torque and makes all of its torque below 2800 rpm and all its horse power below 4800 rpm . i bought a whole 1989 firebird for 500 bucks and had everything i need so i dont spend alot buying it in peices . as for putting it in my truck it is really not all that much more work putting it in than a 350 with a carb . also try to get a setup from a 1987 to 89 to get the engine with a roller cam and lifters . also dont use a 1990 to 92 tpi because it has speed density and not mass air like the 1985 to 1989 does . mass air is that if you make a change in the cam or add other performance parts and the engines computer will respond to the high perfomance parts and will produce more hp and torque .