From 2008:
https://forum.ih8mud.com/threads/master-cylinder-residual-valve.213410/page-2#post-3199411
Post #28
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IMO, the earlier style looks like a smaller version of a particle board shelf bracket. I have the OE in the’68 and the’69 and sometimes find myself using them while camping for the novelty of offering a visitor a seat.😉
@kunzma just mentioned getting the Chebby hold down in his Tink thread.
I personally like the updated stock holder and holddown. Just put a fresh pair in the Karma cruiser a couple of weeks ago. It has the advantage that the holddown is nowhere near the terminals.
Even though I was lucky...