First of all, I have a 235 in a 60' (for now), low miles, runs great and purrs like a kitten. A good friend of mine, bought a while back, a supposedly freshly rebuilt 235 from a local, well known car collector. All painted up and nice. He puts it in his 55' Chebbie, runs good for awhile, then his oil light comes on. The upper end seems dry, and lifters are rattling a bit. He just put in a new oil pump, no difference. Still seems to have no, or very little oil pressure. We look at our 2 engines. Mine is VERY original, the vacuum modulator on my distributor is about 1/4 turn CW away from the block. His, modulator, is right next to the block, so his distributor is rotated ccw almost 1/4 more than mine. My question is, is the 235 distributor similar to the "W" engine distributor, where on the lower part of the shaft housing, is there an oil clearance groove, with part of it having a "Boss", in the groove, which in his case, could be blocking off an oil passage?? I told him that would be my guess, so I think he is going to try that, rotating the dist. CW a partial turn, then relocating all his wires back, and re-timing it. ANyone have any insight on this perplexing problem for my Buddy?? Thanks for any wise opinions on this. Brian.