I'll answered my own question...It's a GM transmission GKT-134 (not muncie, etc).
Last edited by Warpig; 06/06/20251:37 PM. Reason: typo
~ Rick
1947.1 GMC EC152 [228ci + 4spd] "Love at Last" Follow in the DITY 1968 Firebird [350-4 + th400] 2022 Tacoma I've been more of a car guy - but always wanted to get an old pickup