Looks like there are multiple variations on the demod circuit. I also found another from a Sams RCA tv alignment guide that only has 1 diode. This guide is for a the little 1956 8”.
https://ibb.co/kKDr15t
I did tack in a 50 ohm between demod board inputs. It did load down the signal a bit, so I may remove it.
Going to experiment with a couple more circuits just to see what couples the 60+ year old Heathkit with the scope the best.