I bought a "4 way" at Harbor Freight Friday. 3 were way to sloppy and the 4th wouldn't fit in the hole.

I just looked through all the McMaster-Carr offerings. The closest is the "A55" model at .312". Still about .018" smaller than the hole and only .005" larger than what I have now.

A neighbor just answered "yes" to an email that I sent earlier asking for a .308, 30-06 or 7.62mm spent cartridge. I'll try that as a bushing in the next day or 2.

'57 GMC 102, Original 347 V8, HydraMatic, 3.08 rear gear, added A/C, disk front brakes, HEI, AFB carb, '98 Honda Black Currant paint. T-boned and totaled 10/12
'52 GMC 152 Stake Bed, Original 228, SM420, added A/C, HEI, disk front brakes, '67 Chev 3.55 rear gear. Gets used as a real truck.