i don't know, with all the power to the rear, if he's heel and toeing, your still trying to put force through the rear caliper while braking. fronts are only subject to rolling resistance and the brake pad.
Sorry Rich, but that's completely wrong. Heel and toeing involves no extra power being sent to the wheels at all, that's the whole point of it: Dip the clutch and blip the throttle as you do so, change gear and re-engage clutch matching the revs to the speed you're doing. If you do it correctly the net result is a very smooth gear change that doesn't upset the balance of the car at the point of turn in, if you get it wrong it can make things much worse stability-wise but won't cause any more issues with the braking.
Have to agree. Left foot braking anyone?