Ok, I know this subject has been beat to death but... For the TBI, what all do I need to convert my 91 crew cab from a 350 to 454? I have purchased a 454 throttle body with manifold (unknown year), seems like I read that I only need to change the TPS and IAC connectors - is that correct? Is there a good source for new connectors? I'm fairly certain these parts came from a C/K truck, will that matter? Any good online sources or books for "decoding" the throttle body application by part number (like a carb)? After all of that, do I need to change the PROM? TIA!!!