Rear brake bias problems - Viper front calipers with rear drums

Imo the 11" rear drums cause too much bias.
Best bet is to install smaller cylinders.

My Dart has C-body calipers upfront with 11.75" rotors.
10" C-body rearaxle shortened to Abody size.
At first I also had rear lockup issues but luckily I was able to 'tune' it away with better/softer tires.