Power steering bother

[RocketsGarage]

I've been fighting with a power steering system on a '68 Camaro build for awhile now with no luck. I'm running out of ideas. The system involves a Vintage Air front runner serpentine system for a big block, DSE rack, remote reservoir & braided stainless lines with steel hydraulic AN fittings. 275/18" BFG Rival tires.

The system bleeds out fine, has correct pressure & no leaks that I can find. Once the car is on the ground & warm the power steering pump starts to get noisy & fluid begins to get foamy. The steering performance is ok just don't like the noise etc. The customer plains to do a little light autocross every once in awhile & I don't want problems.

Idea's for a fix?