Paxtoned 416 won t fire with lid on when engine is cool

Ok. So. The problem I believe is solved almost. The engine builder said he was having issues with the factory choke working properly due to the aluminum heads with no heat riser holes. He said he disconnected the rod at the carb. But the rod got wedged in all that linkage and was not letting things move properly. I freed this and for the past 2 days it starts cold. Pretty easily. I honestly think the electric pump helped as well. Thank you all for your suggestions and help.

So now I’m having a new problem. The car seems to idle ok but when you take it for a ride it breaks up pretty bad. As soon as you give it some throttle it breaks up. Timing or air fuel mixture? Because it ran fine before the blower install.

I m not a mechanic. But I m not afraid to do whatever I have to to make it work and not burn it to the ground lol