Leon, the best place to get a Powerglide converter that I know is A-1. Send Marv your dyno sheet and talk to him about your combination and I am sure he can fix you up with the right converter. I know that you will go faster with a pro flite though. My mph is similar to yours. It usually goes 151 or 152 and it only went 154 a couple of times. I do have a sheet metal intake with 2 1050 Dominators.