[Tom Wells]

jamesw,

I have a 2.88 Jag in my Cobra with the 521. My Zephyr wagon has an 8.8 with a 2.75; it has a 557. Both have C6s.

If your engine is stock you might want to try a little higher number, probably not more than approximately 3.00. Mine can spin street tires at 100 mph with those ratios if I whack the throttle...

Also, I have 1600 rpm stall converters in both cars - about the same stall speed as a stock converter. A "loose" converter with >2000 stall would be a heat and tire smoke generator. It would reduce your mileage too. There's a mud truck converter maker in Deland FL who supplies mine.

Hope this helps,

Tom