Try what Dick said and maybe, this. By '76 it should have HEI I believe but sounds like a condenser should be checked. Not as likely with the HEI as points but still possible, but more likely is that you touched some 40 year old wire that was borderline to start with ! So I would start with re-tracing your trip trough the "Tune Up" and check anything that could have failed because "it didn't like the way you looked at it"
I was just thinking as I was reading and this also sounds like a plugged fuel filter/sock just going over some things in my head Harry again
I'm not a hoarder I'm a preservationist 78 Monza Spyder (Soon To Be 2+2 with Spoilers)