Getting ready to swap a tbi into my 93 gmc k1500. Currently running a carbed 454 and th400. Picked up a tbi setup from a late 80's 454 and this is where it gets fun. The guy gave me a 7747 ecm that he thought was for the motor and tbi. Looked up the bcc (ASDU) and its for a small block. So i pulled the original pcm from the truck and its an 8625 with bcc BHAS which i cant find. Truck has tbi wiring from another 93 or 94 i dont remember. So im wondering which ecm/pcm im better off using? I really only need it to run the tbi. I know most use the 7747 but i dont know why. Thoughts or opinions?