ok so i might be scoring another 83 4x4 just like dads, except instead of a 22r its a 20r... my question is, how good of motors are these? i know the 22r is bulletproof and indestructable even to the most horrible maintenance. but idk much about the 20r. and is there much aftermarket parts or even potential in these? im looking for a DD that i can take through the woods every now and then