Procharged BBC questions???

I just purchases a used P600b for my 468 BBC. I am looking for some advice on settup up the fuel pressure. I got a modified mechanical fuel pump, and a house that runs inbetween the fuel pump and the P600B, on the car right now is the Holley Volumax 250 electric pump. I was told by Procharger to get a Boost sensative regulator typically from Aeromotive.... The guy I got the P600B from said he was told to use the pump he gave me as is, same motor but different internals. I am running 10.5 comp. he was running 8.5 comp.

Please give me any and all advice on what to do from here... What pump should I use, etc?