Choosing a converter has me pulling my hairs.

I'll never use Hughes again. I talked to them gave them all my specs and they sent me a converter, a 9.5". It was pretty loose for a 9.5 converter. I kept thinking the car should run better than it did. Anyway to make a long story short I called Paul Forte at TurboAction and talked to him. He sent me an 8" and my car picked up 7 tenths. That's a huge amount.