The exhaust from the gas truck has no cats, but it doesn't have a metered cat anyhow, I knew I would have to swap fuel tanks and lines so it will have factory evap. I was thinking about getting headers and a cam/ injectors while it is out. But that only works if I do the holly wiring and ecu. 1500$ and then a stand alone trans controller for another 800.
I will try to just set it up exactly how it sits in the 96 engine bay, with the 96 fuel and exhaust system too, find a wiring diagram for both 96 and 94 compair were they connect at the firewall and repin or splice. If it looks like it will not mate I will install the 96 interior side fire wall and repin and splice as needed. Make it look clean and factory. If it doesn't work ill throw the money at it.
Its one of those "show truck usa" badged 3500s crew cabs no rust and nice interior, so I think its worth the work.