Summit lists an AC Delco 10467353...
...Echlin DG613 (looked up for a TBI small block.) What's odd is it's clearly a main shaft, magnet, and rotor - but it's referred to as a "gear and pin kit."
Rock lists Standard DG43
Yep. At least one of my purchases was listed as a "gear and pin kit". Standard Motor Products (SMP) owns Echlin, the parts are probably the same.
Thanks for the reminder of the part numbers.
V6 items will of course be different than V8, owing to the two additional points on the "star wheel"/reluctor.
The first I learned about cracked magnets was when my '88 K1500 died 300 miles from home. The Chevy dealer put a new mainshaft in the distributor, which fixed what had started-out as a high-speed misfire but got lower- and lower-speed until it wouldn't run at all.
The Genuine GM mainshaft also included a rotor, as did at least some of the still-in-the-box aftermarket replacements.
My suspicion--with no evidence--is that the aftermarket was either buying Genuine GM mainshafts-plus-rotors, and reboxing; or the aftermarket (SMP, perhaps) were supplying GM to begin with, and just put
some of them into boxes labeled for the "house brands"--SMP, Echlin, GP Sorenson, BWD, etc. instead of GM/Delco boxes.
Which likely explains that when GM discontinued the mainshafts, the aftermarket also disco'd at about the same time. I think any still available are NOS, unsold stock loitering around in the back rooms of various parts suppliers.
But I've been wrong before.
