rumblefish360 said That would be correct. To make things more difficult, using a tube to sleeve the pushrod hole isn’t an easy thing to do since there not a nice round Click to expand...
rumblefish360 said machined hole. But it’s possible to use a brass tube and then fill the space with an epoxy. JB weld or other. The pushrod pinch is NOT the restriction on the head to worry about. The port will go 290/300 without removing the pushrod pinch. Click to expand...