Curtis - If you are just needing the 2nd-3rd clutch assy w/synchronizers, there is a pretty good looking used one here on eBay at present. There are two known GM#s for this assembly. The earlier is GM# 3733889 Clutch assembly - synchronizer: 2nd-3rd speeds. The later is GM# 3774720 - same description, which is actually listed as replacing GM# 3733889 before this later number was retired.

Borg Warner made and sold replacements under Part# "WT266-2.5", but I couldn't find anything offered on the web.

If you don't wish to pursue the ebay offering, put an ad up in our Truck Parts Wanted Swap Meet forum to see if there are any Bolters that may be able to help you out. Good luck. smile
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~ Dan
1951 Chevy 3 window 3100
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"My Grandpa Carl's Truck and How it Became Mine"
1966 Chevelle (Wife's Hot Rod) | 2013 Chevy Silverado (Current daily driver)
US Army MSG Retired (1977-1998) | Com Fac Maint Lead Tech Retired (1998-2021)