jim, The shaking when you let the clutch out is either the flywheel needs resurfacing (trued-up) or the crank is bent. I've also seen where someone cut the nib off on the end of the input shaft because the crank was not cut for a pilot bushing which cased vibration. Hard to believe all those items where wrong on your car. Are you sure the guy wasn't fishing? 
1970 Superbird 440 Six BBL, 4-Speed, Dana, FJ5
1969 Daytona Charger 440 4-Speed, Dana, EV2
1971 340 Challenger Conv. Flemington Speedway Pace Car, FC7
1970 340 Six Pack Callenger T/A 4-speed T8 Tan
1971 340 Challenger RT Formal Roof, EV2 w/ V2 Stripe & Orange Houndstooth
1969 Talladega Torino, 428CJ
1969 Gurney Special Cyclone Spoiler II, 351 Cleveland
"Id rather have a bottle in front of me than a frontal lobotomy" Ben Franklin 1755
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