Drag car brake/proportioning question

Duane said

That flap looks like it is just to seal the **** pit. Depending on who you talk to, a race car should have an adjustable pro portioning valve to decrease front braking or increase rear braking depending on how you look at it to offset the skinny and fat slicks that are common on race cars.
Stock pro portioning valves are for stock cars with four identical wheels. The last thing you want in a race car is to lock up those skinny front tires at 120+ mph imho.

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I agree about the flap and I plan on replacing that also during this job as this one has split over the years.

Thanks for all the replies guys. The consensus seems to be to add an adjustable proportioning valve while I replace the brake lines. And then do some testing and experimenting to see what works best with my combination. As a few have mentioned I do have big slicks our back but skinny tires in the front. Better to have it plumbed in to adjust if need be than to have to go back and add one later.

Thanks all.