yep...raced a 10.0 index on 400 protree for years, season points deal.That same night they had a footbrake bracket race. Car ran identical either way. 1.34/1.35 either way and same ET.
If the convertor is right for the car, either way should make little if any difference. At least rhat was my experience on a well sorted 9 sec ride.
I am soon to find out with my current car. Broke the 8.75 today.
Dana coming..and will use my brake, and foot soon.
