BRIAN posted this in another thread:

The other thing you will need is a genuine GM seal for the sector shaft.

The rebuild kits come with a seal, but those are junk. Group # 6.855, part #07801626


'51 Chevy 1/2 ton w/'62 261, HEI, offy, fentons, dual carter/webbers, t-5 & 12 bolt posi