Which 302 firing order do you have? Is your engine original? Early 302's 1-5-4-2-6-3-7-8, later firing order was changed to 1-3-7-2-6-5-4-8. Determined by cam. Did you swap wires 1 at a time or all together with new cap?
Best source for modeling of all types. Local chapters across the country, usually meet once a month. Been a member since the 70's. Most have a Facebook page too.
https://ipmsusa.org/
https://calendar.ipmsusa3.org/chapter/ipmsthree-rivers-chapter
Without a proper paper trail, that car technically may still belong to the owners estate and could be claimed at some point by the heirs. Research "Title jumping", illegal in all 50 states.