4 speed conversion. Help or hurt value of car?

I think it hurts the value. Not too many can or want to drive a manual.
You would be suprised how many multi-carb #'s matching cars we have converted. Building over 150 A833 trans a year I find it hard to believe that no one wants to drive a manual trans and I'm not the only one who does them. Let alone all the other tremec manual conversions. Bottom line its your car so build it how you want. Given your position its my opinion it would increase the value of your car.