Pretty specialized item! However being the weirdo that I am I have an application for it. I have a tired but eminently restorable Canadian built 1967 GMC shortbox-stepside  4x4 with a 292 that was built on May 5th 1967.(One of 33 of that model according to the boys at VVS.)

Once I get around to it I will probably wish I had a good flywheel so.. PM coming your way.

Yeah when the concours judges rip my engine apart to make sure, I can stand there smugly!

I'm have an early 6-counterweight 292 crank in my low-deck six. I think they only used them 63-64 in the U.S. but up to '66 in Canada. I'd have to check when I have the time to verify. IIRC my builder made the engine neutral balanced & used a small block flywheel. Trucks can have clutches to 12" in some 292 applications.

Attached are some AMA specs for a 1967 K10 4wd. Base price was very important in marketing and so with the 250 as late as '67 they still came with crash box 2.94 low 3-speeds with 10" clutches, otherwise a 4-speed or a 292 came standard with an 11" clutch. On C10 2wd models the fully synchronized 3-speed was optional with the 250, standard with other engines. The 2.94 low 3-speed was replaced in passenger car lines for '66 with a fully synchronized 2.85:1 low 3-speed.

I just learned something. The crash box 2.94:1 low 3-speed was the only 3-speed used on KS10 (6-cyl) & KE10 (8-cyl), EVEN with the 327, in '67. The M20 4-speed was a H.D. Chevrolet 465 with a granny gear with something like 6:1 low. Those had a shift ball that said: L 1 2 3 in the H-pattern for the forward gears. Curiously the 327 K10 that year was 3-speed only.