A/MP: Thanks for the input. I'm thinking that this would be a good time to do the flushing, since the oil is staying clean much longer now. A final assault if you will. What would you recommend for the oils? I think the old Type F trans fluid was the highest detergent content, but I've not kept up on the newer blends. And I've been running 10w 30 or 40 depending upon ambient temps. But we're in a cold streak so I might go down to the 5W 20. Thoughts?

Dave: Are those timing chains a pain to do? This will be my first time digging into an OHC motor in many years. And in fact, I'm highly considering having my buddy do it. He has a good local repair shop. That way if something gets overlooked, it's not on me.