Thanks Tim, I'm flattered, but mine never seemed bad, and I rarely if ever remove the cab when I do my 'restorations'. I work around it. What I DO know is that they look to have a lot of shape to them. Not a simple wedge. Rawlir in Spokane Wa might be the guy for this question. He's one a them 'Frame off' guys. Perhaps I could crawl under and get some pics/measurements later today.
i HAVE ALWAYS REPLACED THESE PIECES OF WOOD WITH NEW ONES FROM CARPENTER OR THE LIKE. i ASSUME 42 THRU 47 WERE THE SAME. I DO HAVE SOME USED ONES (NOT SURE WHAT TRUCKS THEY CAME OFF OF) IF SOMEONE WANTED THEM.