Gearbox differential housings before the fitment of bolts had had the following studs-3/8"unc stud for the casing and unf thread for for nut
Remote gearbox differential case used-
53K266 are 4.5" long -4 for remote now use
TAM161753K1471 are 3"long 5/16"unc x3 or use 51K885
Rod change gearbox used-
22G1834 are 4.5" long 3/8"unc with 0.375" thread rod change only x2-use 51K282
CHS2624 are 3."long 3/8"with 0.250"thread x 3 or use
BH506181 bolt
53K1471 are 3"long 5/16"unc x3 or use
51K885