Need Help! Motor turns....won't start

Sounds like a choke issue now. Search FABO for choke and "choke pull-off". My 225 Slant Six w/ Holley 1920 carb was always a problem starting until I found my choke pull-off wasn't working (torn diaphragm). You need the choke set where it is closed pretty tight on a cold morning, then the pull-off pops it open slightly (to drill diameter shown in manual) when the engine starts running. If not, it will flood rich. Best to start looking for a better carb since the 1920 has many problems and many rebuilt ones are bad. Many prefer the BBD carb. You could even take the whole intake, O2 feedback carb and engine controller from a 1980's slant six (I think they had them) to be fairly modern. Check www.slantsix.org for ideas.