No i know, i have borrowed a mamba and ran it for a meeting in my touring car but i prefered the way the GMs and Novaks ran, when i ran the 4.5 with the GM in my pan I didn't have any problems with gearing or over heating. After a 5 min run the motor and speedy were less than 50 degrees C. I did gear higher than what i do for my touring car as you have less friction in a pan. I ran around 6.2 or 6.3 (90/15) and the car ran perfectly.
Sunshine Coast QLD AUSTRALIA
"If you stand still long enough you'll go backwards"