What's it doing ?or better what's it not doing ?.

My experience on the str8 forward carburated cars (4 CYL ?, WITH 1 Stromberg carb ?), a very simple design, it's usually like clogged fuel lines, old fuel, gummed up fuel system and carburator, or even points gap or condensor / ignition adjustment issues.........

stick another relay(s) in there that you don't know work(s) any better or worse would tell you what ?

Check
1. fuel issues,
2. ignition

That simple....

An answer back here would be nice as to how far you got and what the issues were , and what helped getting it fixed.

Thanks

Good Luck