I do run a three speed R3/W9 in a 3,180 lbs car. I have been told I need a 7" 7,000 stall converter by folks that should know.

Right now I am running an 8" that flashes to 6,000 or so.

I have to run a single 750 CFM carb and it does want to run at the RPM level you are at, at least so far. Getting ready to dyno a new cam so maybe that will change.

I am still in a development mode and trying to learn from others.

Again thanks for sharing information with us and I look forward to hearing more down the road.

Bill