I converted a 1600 gas to an alternator a few years ago. Would think a diesel will not be much different.
A few tips:
- Use a Delco 10SI internally-regulated alternator. These were used on virtually all GM cars/light trucks from the mid-70's thru mid- 80's. They are cheap, easy to wire and are almost bullet-proof. (I used one off a 1980 GMC pickup simply because I had it around)
- Use the pulley/fan from the old generator on the new alternator.
- You'll need fabricate modify the generator pivot bracket - or make a new one - to fit the shorter alternator.
- Use the old generator tensioning bracket.
- You will probably need a new fan belt (the existing one will be an inch or two short).
Wiring is straight-forward:
- Remove and toss the old voltage regulator. Tape off the unused VR wiring.
- Run a 10 ga wire from the alternator output stud to the HOT side of the starter solenoid.
- Run a 16 ga wire from the LOW SIDE (not the ignition switch side) of existing generator warning light to the alternator #1 aux terminal. Make sure the warning lamp is not burned out (the alternator won't charge if the lamp is out).
- Run a 16 ga wire from the alternator output stud to the alternator #2 aux terminal.
Hope this helps...