904 Valve Body Selection

I am planning a floor shift conversion on my 75 Duster (Bench Seat) with rebuilt 318, 30 over, Edelbrock Performer RPM intake, 650 Carb, mild cam with 360 heads and a 904. I sure could use some help and advice. Several other threads have indicated that a B&M Megashifter BM 80690 (Ratcheting Type) is a good option for this application. What type of valve body should be used with this shifter? Also how do you determine what type of valve body is currently installed ? Motor and transmission originally came out of a 1985 Dodge Diplomat Police Car. The Diplomat had a long unsavory history passed between brothers-in law and friends. She had been around the block more times than Susie Sweatbelly and Mary Monkeyf***. No telling what kind of communicable diseases the Diplomat is carrying-Any help would be appreciated!
The 318 in my duster originally came out of a cop car and it had a 727? Why the cop cars had bigger Transmissions. Anyways I don't think you need any kind of valve body change. I've had the same exact setup with a 318 360 heads. Doubtfully with this setup you want to go to a reverse valve body of any kind that's just kidding a little too crazy for what you're doing and your motor size. I found a nice Quicksilver ratchet shifter at the Swap Meet. I consider a reverse manual valve body or something like that to be more track dedicated kind of stuff. I suggest a nice strong shift kit and a ratchet shifter.