Your questions are best answered if you post them in the LSx forum, but here are my answers/opinions: 
 
-Yes, that motor will work.  You will need ECU, wiring harness (either reworked OEM, or from aftermarket companies like BP Harness, PSI or Speartech).  You will also need a DBW throttle for that engine. 
-Vintage air will be compatible with that motor.  You will need to get a mounting bracket that works with your application.  You will also need brackets for alternator/power steering pump as well.  You can get the entire set up from Holley/Vintage Air/Drive Junky.  There are other companies that make the brackets as well. 
-You will also need motor/trans mounts, and headers that work for your car.  Holley also makes a complete swap package. 
-Other items you will need for the swap: fuel tank/fuel lines if yours are original, drive shaft, plus any parts to complete your t56 swap. 
 
I don't know off hand of any shops that does conversions in Houston area.  Maybe others can chime in.
		 
		
		
		
		
		
		
			
		
		
		
		
		
	
	 |