Will GM 200r4 work with factory floor shift location?

Just remember that the amount of throw is determined by both the amount the shifter moves and by the length of the lever on the trans. When I put a 700R4 (very similar to 200R4) in my '35 Chevy I hooked the cable directly to the shifter and made a lever for the trans with a series of holes to adjust the amount of throw. Also, you can either have the trans lever pointing up or down so that it gives you a choice on which direction you approach the shifter (pushing or pulling). You might have to design/make a bracket to hold the cable end where it attaches to the trans. They sell these brackets but I don't know if they sell them to use with the trans lever pointing down?? But things can be modified!!

Treblig