siteunseen

Hello everyone. 1st post so I hope it's done right. I bought a '77 in pretty good shape. Hadn't been driven in awhile but would crank and run. Drained the tank, cleaned out cone shaped filter in fuel line from tank. Seemed to rev up better but when I took it for a drive fell flat after 3,000 rpm. Put fuel gauge in between filter and fuel rail and it shows 25psi at idle but when I give it gas it goes down to 20psi. Should I put new fuel pump on? Found Bosch at Advanced for $240.00 after 20% off $300.00. Does the fuel dampner/regulator ever get out of adjustment? Could it be that? Still holding at 22psi after not being cranked for 12 hours. Also have been cleaning all grounds and bullet connectors. Clear Fram G-3 filter out of gas tank and its still nice and clean. Advise me please. Second opinions are great. Thank you all.