I'm building a cheapskates pump at the moment off a body I got from Gee Tee, I've sealed up the LPR port on the front block with an 1/8 NPT plug and dismantled a ram to result in a 1 finger pump, just need to figure out a return spring now, its going to be stock class so I'm not worried about speed.
Any how that's all off topic, no you don't need to worry about pressures, the front reg will take it low enough.