I'll see if I can help here.  
1-you will need to have 1" setback mounts to keep the trans in it's original location and avoid changing driveshafts. 
2-did your truck already have a 700-r4? If so the 4l60 should use the same holes and go right in. I believe. Someone else may want to confirm this. 
3-energy suspension # 3.1108g for the mount.  Autozone stocks them and they are cheap.
				
			 
			
		 
			
			
			
				
					Last edited by Chevydillan; 08-12-2014 at 04:10 PM.
				
				
			
			
			
                        	
		        
			
			97 RCSB . 2WD . 5.3 . 4l60E . E-FANS . PNP 706s . TSP 228R . 3600 STALL . HD2 . VETTE SERVO . 3.73s . 2" DROP
TURBO IN THE WORKS