Drag Car Brake question

I have also been going through braking problems on one of my Race Cars also.
It locks the fronts fairly easy, more so with the right front.
I have a couple of flat spotted tires to show for it.

I'm running a 1973 style M/C with a dial-poportioning valve.
Std 1973-up discs & rear drums.
Tried to dial more to the back & the fronts don't hold very well.

A friend of mine has a 9.90 Malibu, he has a late style MoPar M/C (Alum) on it.
He reversed the lines on it, front goes to the rear & so on.
He has great smooth even braking. He also said alot of racers he knows does the same thing.
Any one try this?