Thanks for the input. I'll probably use the Mobil Delvac 15-40 once the snow has cleared and I can get to the garage! 601 that is an interesting article on
oil. We gotta get over to Famous Dave's for some Q and a beer! Maxx I have no idea of the clearances and spring pressures because the engine builder up in Michigan computerized his records after this particular 347 was built. It's got almost 30k on it. Tom