Hello again, Engine shop. Continuing saga on distributor issue. Pertonix tech says ~58 GM retooled the sbc's in the vicinity of the oil passages near cam gear & changed cocnfiguration of the distr shaft to improve the design. Thus <~58, 265 & 283 will have blocked oil passages to upper engine, if a >58 (& current) new distributor is installed. Which I have verified by trial & error. I believe I have another <~58 org distibutor in my 'stuff'.
I will clean it up (very dirty), try to verify that it is not worn out & then install electronic kit direct from Pertronix for my old distributor.
I now believe that my issue was that new distributor was making oil pressure, but with upper passage blocked, we could not see gage oil pressure. Tech I visited with twice now, assured me that there likely was oil pressure to the lower end but none to the top, due to blockage from wrong (new) distibutor.
I will update as I attempt to get back to breaking in my 265 with only a week lost. I now have an extra Pertronx distributor to put in my pile of old ones!
Summit, who sold me the new distributor, has thus far refused to take it back!
delky dave in Wyo
