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Does anyone know a source for the rear engine mount bolts for the 3 speed, the transmission to rubber insulator bolts, I think they are 1/2-20, about 1 3/4 inch long and are drilled for a cotter, I cant find them at any parts house.
Look at "hardware" on the aircraftspruce.com site. They are grade 8 and come in all lengths either drilled or undrilled. This is a common thing for aircraft maintenance.