[DeadheadNM]

Originally Posted by BigBird05

Does it matter what size brakes you have? Are all E-bakes parts for HO52 and HO72 the same?

The answer is, “Depends”. Some components (spring for example) are common to 1/2t, 3/4t, and 1t axles. Other pieces (brake shoe lever for example) exchange for 1/2t and 3/4t but not 1t. Note the left park brake shoe lever for a 72 ser20 4wd doesn’t exchange for other year 4wds but does with 67-69 Ser 20 2wd, 70-72 Blazers, and Ser 10 2wd 56-72.

Andy, it’s a minefield in terms of parts selection to be honest especially for a 72 4wd rear and C30 with the differing capacities. IMO you’d be well served with a copy of the parts manual. The parts can be had and often inexpensively. I just saw outer bearings NORS USA made for $7 ea or best offer; pinion felt seal NOS GM for $10 shipped. You’d probably save yourself enough cash to recoup the expense of buying a parts manual by buying old stock versus buying new parts.

Torque King 4x4 may be a helpful parts source too: https://torqueking.com/category/1967...052-rear-axle/