You can buy the direct fit head pipes from TTI and Accurate. Pricey but good fitting stuff for your manifolds. It’s a lot cheaper to make them up.
Maybe treblig has one laying around from the old days.
Good luck.
I called both of them. TTI was quick to get me off the phone. They said with these casting numbers they only make head pipes for '67 and up. That was after calling one day and got "the guys went home early" and days later with a "they're all at lunch" etc etc. Accurate was nicer to deal with but they don't make the head pipes either.
