BB Corvettes used the "short" dipstick tube (pass. cars used a different tube, about 2" higher).
From '65 thru early '67, Corvette BB's used tube #3962732 and stick #3860316.
From late '67 thru '74, Corvette BB's used tube #3870324 and stick #3925520.
Hydraulic-lifter BB's used oil pump #3904827, solid-lifter engines used #3904826 (same pump, different pressure bypass spring).