Willys-Overland has the perfect solution for your M38A1 build
Steering Shaft Coupling Kit for Select 72-86 CJ-5
Right Front Axle Shaft for 1982-1986 Jeep CJ-7
Front Wheel Cylinder for 1966-1971 Jeep CJ-5
1953-1964 Willys Jeep CJ-3B
Clutch Kit Suspension Willys-Overland has the perfect solution3 Piece Clutch Kit for Select Jeep 1972 1975 CJ 5, CJ 6 w 3. 8L, 4. 2L, 5. 0L Engine, 1965 1977 SJ, J Series w 3. 8L, 4. 2L, Engines, All w 10. 5" Clutch, 10 Splines, 1. 125" Spline Diameter, Includes Clutch Disc, Pressure Plate, and Clutch Release Bearing