I have never done the swap, but if the pinion seal is 4 inches in diameter. Use just 1 gasket you should me fine. Modify spring mounts as needed I would also check length of the WC axle its longer than m37 axle.

Good Luck John

Air filter shroud sold
thank you

John

Dodge had 2 sizes of ring and pinions in the axles 8 3/4 ring gear early vs 9 5/8 ring gear diameter late.
Check with a tape, slide rule m37's all came with 9 5/8 ring gear
Hope this helps you

Wc dodges had 8 3/4 in the beginning they change to 9 5/8 later

Good luck reselling it

John

M series blackout head light, sold thank you
rest still for sale.

John

If memory serves me, (I don't have a parts book in front of me.) The snap rings had 4 sizes. The way you find out the size is put the thickest one in if it will not fit, try the next size smaller witch ever size fits that's it go from large to small thickness. as far as finding them someone on the f...

M37 parts for sale
Fording shroud $75 obo
2 lug wrenches $30 each
Bread box regulator $75 obo
BO drive light $40
Generator to reg cable $75 obo
3 wire regulator harness $75 obo
4 wire regulator harness $100 obo
parts are in Carson city NV
If interested send PM
Thanks