Jeff, In my opinion you would be better off spending your $$$ on other things. The M-21 came behind plenty of big-block cars and are plenty beefy for your application. Are you planning on racing the car? I'm not sure that you would be happy with the amount on noise that you get from an M-22 gearbox if the car is a pleasure-type driver. Your call.
HTH,
Alex
'66 A/C Coupe
HTH,
Alex
'66 A/C Coupe
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