The front brakes are decent 4-piston Brembos, the rears are single piston calipers from a Renault Alliance/Dodge Monaco vintage late 1980's. You don't get enough brake torque from the rears, so the fronts lock up first and easily.
You can disable the OEM proportioning valve (do a search, lots of posts) which gets rid of the rear brake line pressure limiting effect and allows full brake pressure to rears under any circumstance. When I did this, I still could not lock up the rears (first.)
An unnamed brake company with many Viper followers (you said no names) has a Stage 1 caliper that reduces the front brake piston sizes, so as to better balance the front and rear contribution. Or if you work at the other end, increase the rear caliper piston from 36mm to 38mm and you'll get similar balance results. In my opinion, you would still not lock up the rears first even with removing the brake line pressure limiting feature.
There are some that are going to a 40mm rear brake piston size, I personally find it only ever so slightly over the edge of balance, so really should install a proportioning valve. However, the appearance is stock, so no special fabricating of the upright, nor special pads are needed. I've melted a few rear wheel tire valve caps, when parked above the caliper, so I need to get more rear brake cooling.
I would estimate that the pressure limiting valve removal makes it about 20% better, the 38mm size caliper in the rear is another 40%, and the 40mm rear is 100% balanced-for me, anyway. Balance does not mean best heat rejection, it's actually probably worse, since all four rotors are now efficiently absorbing lots of heat. All those big buck race calipers and rotors can take more heat and provide balance; this system provides balance and OEM level heat rejection.
Changing to another master cylinder won't change front to rear balance, since the MC bore is straight through and not staggered. Both ends will get the same pressure.
The SRT-10 looks to have 4-piston calipers front and rear; therefore with more than enough capacity at the rear, it can be throttled down to the correct level with a proportioning valve.