41 Ford rough running, backfiring, and hard engine vibration

[30aadoodlebug]

Definitely a huge vacuum issue. I plugged the vacuum hose to the wiper and she's leveled out. This was a perfectly running and driving car three weeks ago. The firing order is correct. I triple checked it. my gut tells me its in the engine and hopefully the intake manifold. I have another one, and plan to make the switch this weekend. stay tuned. also, I am rebuilding the wiper motor, and have an nos 41 wiper switch to put into the car as well.