I take it the 2" recess is for the pilot bearing? bronze pilot can be made to any size you need, as long as there's enough room for it as is. Just a idea if you have a hard time finding a machinist to turn that flywheel.
actually it uses the same bearing/bushing specs as stock dodge. the part getting milled out is to allow the flywheel to get closer to the transmission. (the input shaft could be shortened as well) i just do not want to modify the transmission so that it will be easier to swap if needed in the future. these trans missions can be had in NEW OLD STOCK for about $600 shipped.
in the military truck it comes from there was a one off clutch housing about like a SAE2 with a adapter ring for SAE3. im guessing that is why the input shaft pilot and splines are just about 1/2" to long to bolt everything up
machining off that lip, and making a 2" diameter 1/8" recess give me about 5/8" more room. making the pilot hole in the flywheel exactly 3/4" deep. the exact same size as the pilot bushing so it will be flush on both sides.
im going with a 2" circle due to this trans having a 1.5" input shaft so it will have no chance of contact with the flywheel.
i also went with the clutch i did because its better than stock for less the stock price and common and available from many manufactures and could actually be acquired at a local Oreillys.
as for clutch pedals im going stock dodge master, and possibly a pull style slave attached to the mechanical arm that came on the trans.
after putting the clutch assembly in my press ive found that the throwout bearing needs to moved 1/4" from rest to full release where you can see daylight between the pressure plate and clutch disk. what this means is the lever at the tip needs to move 5/8th of an inch to pull the bearing completely off the pressure plate yet travel enough to fully release. also with a pull style they are very adjustable so you can properly adjust as the clutch wears. total throwout bearing travel on the transmission is 1.5" so there is a lot to play with. this syle does not require any preload so bearings should last a very long time.
as for ratio's. this will give the best of both worlds between a 3.55 and a 4.10 final drive. some of you already know this but with the 4.10s you cannot downshift at 65mph without taching out, and with the 3.55 your 1.1 gear is great up to 65mph but OD is to high for any heavy load. (with stock tire size)
this lets me run my 3.55 final drive i just swapped in from the 4.10 but still gives me the 2k rpm at 65 in od. far better for towing. maybe not so much for racing and what not. also the transmission is much tougher built than any dodge transmission and much much cheaper to flatout replace if needed.