Now I am confused on what you are swapping. If you are swapping a 94 6.5 motor into a 1993 6.5 truck, STOP. and i'll tell you why.
When i did my swap i swapped a 93 mechanical injection into my 1994, which had electronic injection. For me, the only reason i did this swap was because i had a 93 6.5 motor that i got for free. With my swap, i took away the electronic injection, not added it. All i had to worry about is controlling the transmission, because i was doing away with the electric injection, and the 93 mechanical injection runs by itself, all that is needed is 12V to the IP (Injection Pump) The 1993 trucks had a different wiring set up in the 4L80E transmission, they used a different internal wiring harness, which was changed in 1994. The pre 94 harness had a lot of issues, particularly with the OD module shorting out preventing the trans from shifting into overdrive.
Now if you are trying to add electrical injection, you are going to need the ENTIRE wiring harness for that truck. Hell even the glow plugs are ran by the computer, so you will have to do a complete overhaul on wiring, in my opinion turning the truck into a giant cluster*uck... Also, you will somehow have to find a way to have the electrical injection pump send information to your pre-94 4L80E, which is going to be a mess. In my opinion, stay away from this swap. It's a hell of a lot easier to take away the electric injection rather than adding it.
As far as for the 6.5, i do like the motor, they are a respectable diesel when taken care of, and will get good MPG. However there were some definite design flaws which require more maintenance than most diesel motors. I love my mechanical converted 94 6.5 truck, especially with the 94+ trans with a 93 mechanical injected motor. IMO, the work you would have to do to get this conversion to run, and run properly would take a lot of work, and a lot of headache as far as wiring in the motor. I'm sure someone's tried to wire a electrical injection 6.5 into a hot rod, but i wouldn't ever add a electrical 6.5 into anything.. Given the work required, I'd rather go with a Cummins or something else, that will provide superior performance and less headache especially when it comes to wiring... now if financials are not there, swap it to a 6.2 or something else that will cost less, stay away from the electric injection swap, it's going to get very complex, and there will not be a whole lot of help for you out there.
Overall, I've grown up with my dad's 6.5 (1993) and bought my own 6.5 (1994) a couple years ago, I've converted it to mechanical injection and have done a lot of research on this motor, and know all of it's strengths and weaknesses. Overall, I like the engine but it requires more maintenance than my gas trucks, and with it's rough starting in the wintertime, and major design flaws, I've decided I'll be swapping a 350 into mine soon.
When i did my swap i swapped a 93 mechanical injection into my 1994, which had electronic injection. For me, the only reason i did this swap was because i had a 93 6.5 motor that i got for free. With my swap, i took away the electronic injection, not added it. All i had to worry about is controlling the transmission, because i was doing away with the electric injection, and the 93 mechanical injection runs by itself, all that is needed is 12V to the IP (Injection Pump) The 1993 trucks had a different wiring set up in the 4L80E transmission, they used a different internal wiring harness, which was changed in 1994. The pre 94 harness had a lot of issues, particularly with the OD module shorting out preventing the trans from shifting into overdrive.
Now if you are trying to add electrical injection, you are going to need the ENTIRE wiring harness for that truck. Hell even the glow plugs are ran by the computer, so you will have to do a complete overhaul on wiring, in my opinion turning the truck into a giant cluster*uck... Also, you will somehow have to find a way to have the electrical injection pump send information to your pre-94 4L80E, which is going to be a mess. In my opinion, stay away from this swap. It's a hell of a lot easier to take away the electric injection rather than adding it.
As far as for the 6.5, i do like the motor, they are a respectable diesel when taken care of, and will get good MPG. However there were some definite design flaws which require more maintenance than most diesel motors. I love my mechanical converted 94 6.5 truck, especially with the 94+ trans with a 93 mechanical injected motor. IMO, the work you would have to do to get this conversion to run, and run properly would take a lot of work, and a lot of headache as far as wiring in the motor. I'm sure someone's tried to wire a electrical injection 6.5 into a hot rod, but i wouldn't ever add a electrical 6.5 into anything.. Given the work required, I'd rather go with a Cummins or something else, that will provide superior performance and less headache especially when it comes to wiring... now if financials are not there, swap it to a 6.2 or something else that will cost less, stay away from the electric injection swap, it's going to get very complex, and there will not be a whole lot of help for you out there.
Overall, I've grown up with my dad's 6.5 (1993) and bought my own 6.5 (1994) a couple years ago, I've converted it to mechanical injection and have done a lot of research on this motor, and know all of it's strengths and weaknesses. Overall, I like the engine but it requires more maintenance than my gas trucks, and with it's rough starting in the wintertime, and major design flaws, I've decided I'll be swapping a 350 into mine soon.
