727 build help

Hello Everyone,

I am building a 74 Dart Swinger for my wife to race, Track only car. It will have about 650 HP MAX. I have someone that is interested in sponsoring the car with a Transmission for his name on the car. He wants specs and needs for it so he can build it. Can anyone give me any ideas of what to request in it. It will be a 727 and I was thinking about a 2500-3200 Stall range. The engine will be a built 360. I will be using 4:30 gears with s/s spring set up with a spool. I really need to do this soon as I don't want someone else to get the sponsorship monies.

Thanks.