Backfire when cold

Mopar69gts said
t takes both feet on the brake pedal to stop!...lol

the M/C for the boosted application is IIRC ; 1 and 1/32, versus about 15/16 for manual; so yes it takes a lot more legpower.
Especially on a disc-brake car, that does not have the self-energizing feature of drum brakes.