anyone ever use the Edlebrock quiet flow fuel pump

The prices of parts now seems crazy compared to what I bought them for 20+ years ago. Dang Inflation!
I thought my old Mallory 250 pump was expensive at around $350 back in the 1990's. Or HS rocker arms that use to be < $600 are now around $900!

well, starting digging into this a little bit, pump is holding at 6 lbs when hot, but i never thought about this, car was tuned in florida at sea level, i now live 2500 ft above sea level ! i wonder if thats part of the problem