Jacob.....
Here's my thoughts.................
Question # 1.......... Street & Performance
Question # 2.......... Same answer or prefab your own AC mounts
Question # 3.......... with the help of S & P's brackets
Question # 4.......... Yes if you keep it in original location, weld notch hole back up
Question # 5.......... Installing the PMC is easy, it's the wiring (if you do it yourself),
                              that is hard, S & P plus a few more companies 
                              have wiring harness that is a 4 wire hookup. But
                              remember you have gauges and none of these harness
                              use the gauges. We bought a Dakato Digital dash and
                              solved all of our gauge problems. I use thge VSS out of the
                              PCM for the speedo, tach out for the tach and added orignal
                              temp sending unit to engine for gauge. New fuel pump in
                              tank, added return line to fuel rail and used orignal fuel pump
                              relay. We went a little farther, we used the VATS key from
                              the donor car for anti-theif. Go to www.webshots.com   and
                              search ' Big Bodie pic' and look at the 90 Chevy red truck.
  
				
			 
			
		 
			
                        	
		        
			
			90 Chevy Reg. Cab, Esclade front cap, 2K LS1 4L60E, 5 & 6" drop, Viper Red, S & P Chrome acc., Still under construction.