Bill are you talking about this list? https://forums.aaca.org/topic/349047-hydramatic-problems/

Chevrolet Trucks, Lever, Throttle Control Outer, 8618043
1954-55 1/2, 3/4 & 1 Ton (6 cyl.)
1956-62 All
I6 and V8 uses the same throttle lever but unfortunately it is not listed on the cheat sheet in the above link.

I've been studying the 1955-59 GMC manual and came across this page. http://chevy.oldcarmanualproject.com/gmc/5559mm/5559mm632.html
4-23/32 or 4.7187 from the rear to the center of the trunnion hole on the throttle lever.
The dimension may not be correct for Chevrolet Truck and 1954 GMC.

Throttle Lever Gauge:
1954-55 Chevrolet truck J-2545-C
1954 GMC J-2545 B and C
1955-59 J-6188 (series 100, 150, 250....PM250)
Looks like the GMC throttle lever changed in 1955.

Last edited by buoymaker; 07/30/2022 10:42 PM.
"Adding CFM to a truck will only help at engine speeds you don't want to use."
"I found there was nothing to gain beyond 400 CFM."