1970 834 Alternators vs. 837's

[Keith Tedford]

According to the old GM parts book, the only difference between the '834 and '837 alternators is the pulley. The '834 got the small stamped pulley while the '837 got the larger deep grooved machined steel piece. The deep grooved pulleys were used on the solid lifter engines. 1100566, 1100836, 1100839, 1100841, and 1100842 are also the same except for the pulley. 1100742, 1100843, 1100845, and 1100917 have a different stator as well. All other internals are interchangeable.