Check out this current '94 and later T-5 adapter plate discussion by member Lugnutz. It even includes info on what he did for drivehshaft on his vehicle.

I do think there may be more to this story though as you haven't mentioned if your 3 speed is still part of a torque tube rear end set up, or if your truck has been previously converted to an open driveline???

Dan

Last edited by Gdads51; 07/25/2023 12:36 PM.

~ Dan
1951 Chevy 3 window 3100
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"My Grandpa Carl's Truck and How it Became Mine"
1966 Chevelle (Wife's Hot Rod) | 2013 Chevy Silverado (Current daily driver)
US Army MSG Retired (1977-1998) | Com Fac Maint Lead Tech Retired (1998-2021)