Thanks man.
No, I don't doubt what Frank said, I was just wondering if the knock could be some additional problem, because the head work is major enough.
No, I don't want to keep the car. It really isn't well-suited to doing 80mph day in & day out on my 100-mile round-trip commute. I liked it until I started doing all this Interstate driving.
Nonetheless, I am going to pull the head and have Frank do his thing. I will at least get some of that dough back when I sell it, and I will feel better selling it. Plus I will at least have a reliable daily driver while I look for a choice 300D Turbo or a 300SD or SDL. Or maybe a Porsche 914 2.0, but I don't think I want to make that my daily driver; I would like a nice one as my toy.
Thanks again.
Ted out.

__________________
Now you're suckin' Diesel!

'88 300SEL
'92 300D 2.5 Turbo
'96 Lincoln Town Car. The Jazzmobile.