Forgot to answer the question of where I got the flywheel from. I picked it up from a 2wd 92 Dakota with a 3.9 V-6. It has the correct Chrysler small block bolt pattern to fit the 318 and the smaller pressure plate hole pattern drilled in it to fit the smaller ax-15 clutch disc. This way I can upgrade to the 3550 easily in the future if necessary.
One thing to watch out for is if you are doing an MPI setup the V-6 flywheel has the wrong tone ring setup. I searched all over the place and could not find the tone ring seperate from the flywheel, and I am not spending $580!!!!!! on a new flywheel just to get a tone ring. I could have just gone and gotten another flywheel and have it drilled for the smaller pattern, but then I am spending $$$ that I could be putting elsewhere. I chose to heat the tone ring up, remove it from the flywheel, fill all the gaps with weld and grind smooth. I then found a picture of a correct v-8 tone ring and made myself a little chart for where the new gaps belong. There needs to be 8 single slots which correspond with each cylinder reaching TDC. I just took the ring and layed it down on a bench at work that is covered in aluminum. I took a scribe and marked the inside diameter of the ring on the table, then marked the center with an X and scribed the lines to about an inch outside of my inside diameter scribe mark. This gave me 4 positions for the slots, all that was left was 4 more that fell in the middle of those 4. I just took a square and marked off a 45 angle between each line which gave me all 8 spots. Transfered those to the filled tone ring after lining up the single slot to a position (needed to cut out 7 slots each 45 degrees from each other). I made the cuts with a metal band saw at the shop and cleaned everything up with a file. Using the photo as a template I found that 2 flywheel bolt holes are immediately in line with each other as well as 2 of the slots. Used a ruler and marked where it needed to go, removed it, warmed it up and slid it in place.
NOTE TO ANYBODY DOING A 5.9 CONVERSION with MPI:
The 5.9 is externally balanced, unlike the 3.9 and 5.2 which are both internally balanced. You HAVE to get a flywheel from a 5.9, which will save you the headache of having to mess with the tone ring, but it will require you to have the flywheel drilled to fit the pressure plate. Even if you are not using MPI, you need the 5.9 flywheel for balancing reasons.
90 YJ 5.2 Magnum, AX-15, 231 SYE'd
D44 front, welded/trussed AMC20HD rear. 4.56 gears soonish.
Western 6 lug aluminum wheels, with 35x12.50x15 Wrangler MTRs
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