I've installed a newly rebuilt 428 I don't seem to have the power I should. it tuned up ok timing,rpm's,temp all look good.I don't know if I'am getting enough fuel to my qudrajet.It runs around 5.5psi at idle. at 40 mph if I try to accerate it goes down to around 2psi is this normal??any suggestions would be welcome to try to get my power.