Can anyone tell me about what RPM should I be running @ WOT with a Ford 460? It is in a 18' Hallett with a jacuzzi 12YJ pump. It idles @ 800 rpm. There are no markings to use to time it so I am just playing it by ear. I am currently getting 4200 rpms. It has a mild cam, Edelbrock performer RPM intake and a Holley 750 carb, MSD distributor. Please Advise?????