I swapped a v8 5.7 TBI into a 1995 GMC truck. I have the 16197427 computer but the Prom number I need is BPUX # 16221008. The problem is I can not find any to replace with my V6 prom. It is a 5.7 M30 trans, GU6 rear end and considerd a C1 Platform. The chip BJYX was superseded to the BPUX. What is the best way to find one of these, been online and at the Junk yards none match. Any help would be appreciated. Thanks