Proprtioning Valve Location on a 72 Skylark

Here is my scenario....1972 Skylark Custom, had a 350/4 engine, I just swapped a 1970 455 stage 1 engine in it. The 455 has ceramic headers.

I have just done a front disc brakes swap also, so I need to replace the proportioning valve.

My question is to the ones that has done a swap like mine is....where should I mount the new proportioning valve, in the normal spot on the frame or mount it on the power brake/master cylinder assembly (to keep it away from the header)?

Thanks

 

In the original location will be fine as long as the header tube clears it by 3/8-1/2"