74dusterman
74dusterman
Motor is a 340 with cast iron J heads. I have a set of adjustable rockers from a 273 that I was going to use. The rocker shafts that were originally with the 273 rockers were worn noticeability so I swapped them with a set of shafts that had the stamped rockers. I put everything together and when I primed the oil pump the oil is not flowing thru the rocker shafts and around the rockers. The notches are down and to the left. When I pulled one rocker shaft off and primed the pump oil flowed out of the oil hole in the rocker pedestal. Oil pump is a melling high volume, oil is Mobil Delvac 15w-40 with a bottle of ZDDP additive, 5 quart oil pan, using a high speed drill so I know the pump is spinning fast enough. Anyone ever run into this problem? I thought about buying roller rockers but I don't have the budget for new ones right now, I was hoping to use the adjustable 273 rockers until the budget allows for roller rockers. Is there a difference between rocker shafts from a 273 to a 340 that I don't know about? I thought all of the shafts were the same.