225 Air cleaner to carb spacer missing?
Your gasket is old, dry, stretched, and twisted...
Get a new gasket for the carb to air cleaner base...
Also you have a white cap on a vent, I think the vent should be left open, not capped off...
It also looks like there may be a few vacuum nipples left open and may need to be capped.... Vacuum leaks will cause sluggish performance and bad fuel economy....