dimis Need a number you are looking for. Whjat kind of power do you want from this? If you want your cake and eat it too, go to an LS motor or coyote motor. If you want a hydro cam shaft setup with rollers you are limited by weight. High
oil pressure will pump up the lifter, need a high spring pressure, no little to no valve lash to stop valve staying open when you go into float. Max rpm will be about 6,400 rpm and this is pushing. If you want more than this, goto another motor like cleveland and rev the snot out of it. There is no rev kit made for roller motors in an FE yet. When there is, 7,500 will be no problem. The other thing is watching the valve spring numbers. I run beehive springs with 15 years on them. 120pounds closed 355 pounds open. Max rpms without power drop starting is 5,600 rpms if setup is done like cranes want with 1/2 turn after contact of rocker having no play on valve stem. Lets get some answers. Is it Foster time yet??
Rick