This is my first real thread as a new member and I am not sure how to address this question, so here goes. I have a 1972 Mustang I am building for my daughter and took out the big block 351 and installed a 1991 Lincoln 5.0 HO and AOD transmission. I put a new wiring harness to install the computer. The retro fit was a good challenge but I love the combination and the car has awesome power with one problem. I have a external fuel pump from Summit that is supposed to put enough fuel pressure for 5.0. The car starts and idles fine but under acceleration it acts (for lack of better terms) like its back fires and will not stop under acceleration. I can get it up to 60 Mph and it keeps jerking or surgeing. I can ease the throttle down and drive around 50 MPH ok. It acts like it's not getting enough fuel pressure and bogs down bad. I owned the Lincoln Mark VII (killed it) that the engine came out of and it was fine. Any ideas?