Hi Guys,I just install a posi rear in my 51 Chevy. Its a 456 8.5 posi. The motor is a 350/365hp with 3 1/2 headers/outlaw mufflers. The trans is a 350 turbo and in not sure on the stall speed. The tires are 4 inch by 26 in front and 10 inch by 28 rear cheater slicks. I know the 456 is way too big but my question is whats the best stall speed converter for this car now as it stands? Thanks for any help...Davey