Pushrod Question

the B used smaller ball pushrods in the early years. you can change lifters or return the pushrods.
...'68 and later are 5/16" both ends, the '67 and earlier are 5/16" top and 1/4" bottom...

pre 68 'small ball' lifters
Comp - 824-16
Eaton/SBI - VL8
Johnson - A-812
Federal Mogul - HT1812