delcos were used in many 4 cylinder engines like you said many parts cap points should work in your tractor .the cost of making a dist to work out of another engine could cost more then the parts to fix yours .i do not understand why you want to replace your old one ? you have to watch the dist curve for engine rotor rotation per fire order if your thinking of re working a new dist your old dist body will need to match your new one so you may need to make a new body out of a chuck of round stock and machine for cap .points plate. bearings . oilers .alot of work .you need to cross over your tune up parts and pick them up were there not costing you so much. many of the delco parts like curve weights point plate dist shaft could work or be made to work. dist shaft can be turned down dist body re bush for new under size shaft