Car wont start unless door is open

67Dart273 said
I would start with "are you sure it's electrical?" Or maybe "is it a tuning or other problem?"

Try temporarily jumpering power with an alligator clip lead direct to the coil. See if the problem stops. If not, obviously not electrical.

Could be carb idle mixture/ vacuum leak/ timing. In rare cases a converter problem "trying" to lock up do to internal problems.

yup. I’m sure it’s not mixture or carb. Vaccum leak is a very good contender. Specifically from the brake booster. Someone in a different thread had mentioned that a nipple on his was cracked, which led to a leak. I set timing with a timing gun couple months ago, but I’ll double check.