Changed intake gasket, now it won't start

I know Harbor Freight sells cheap motor stands and that's the big part. as far as a cherry picker I went so far as to get the motor always taken apart and ready to pull out and running down and renting one for Just 4 hours enough to pull out the motor and put it on the engine stand. Then go back and rented the day I'm ready to put it back in.
It is running worse, but still runs. Some people might think it is running fine but I can tell something is up. Pulling the motor might be a winter thing, last resort kind of option. I have never rebuilt a motor but my father in law has many times. Only issue is I have no equipment to pull the motor with.

Im going to try everything I can first. Thus the carb stuff and the plug wires. Plug wires are rather new anyway but it only sets me back the cost of the wires to try. They are way too long as it is now.