The 1988-1995 trucks use the removable chip. Never actually seen one though. The Vortec equipped GMT400 trucks have a computer that had to be flashed by the dealer, or now anyone else that had the equipment to do so. The 5.0 never came with the 4L80E, where as the 4.3 did in some vans, and the 5.7 commonly came with it. I can't get GM to flash a payload to the ECM, because you need a VIN to do that, and the 5.0 and 4L80E never came together, so that's out. I could get a place like HPTuners, or someone with EFI Live and the correct licenses to do it, but it's still a 5.7 to 5.0 swap, and I don't want to dump a lot of money in that swap.
I recently bought the truck and dumped ALOT of money in parts into it, with the intention of knowing what I had. Turns out sh!t can still go wrong. I really don't want to put a crate 350 into it, because for about the same money, I can put a LBZ Dmax/Allison from a wrecked '06 in it. I could buy a used 350, but you just don't know what you have with that. (I know, same problem with the Dmax) I have a 305 that I know to be good, so I'd prefer to do that. That engine had always treated me very well. Has never caused a whisper of a problem.
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Today's Featured Article - 12-Volt Conversions for 4-Cylinder Ford 2000 & 4000 Tractors - by Tommy Duvall. After two summers of having to park my old 1964 model 4000 gas 4 cyl. on a hill just in case the 6 volt system, for whatever reason, would not crank her, I decided to try the 12 volt conversion. After some research of convert or not, I decided to go ahead, the main reason being that this tractor was a working tractor, not a show tractor (yet). I did keep everything I replaced for the day I do want to restore her to showroom condition.
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