Bizarre SB 915 Heads
Got this set of 915 heads done with a 340 core. There is no casting numbers or date code under valve cover...only the 915 casting numbers on head gasket surface. Never seen a 915 head with the pollution exhaust. Intake ports are x head size... exhaust ports are smaller. No letters are cast into head anywhere. Opinions?
Got this set of 915 heads done with a 340 core. There is no casting numbers or date code under valve cover...only the 915 casting numbers on head gasket surface. Never seen a 915 head with the pollution exhaust. Intake ports are x head size... exhaust ports are smaller. No letters are cast into head anywhere. Opinions?