Take off the air flow sensor. Select a carb of appropriace capacity to th engine displacement. (cc, liters or cu in). make an adaptor to install the carb t the manifold. Connect the throttle cable to the carb. Connect the fuel line. Install an air filt er. disable the ecu. Note: this can be done for car with mannual transmission.

Uh, just get a new engine. You can't change the intake manifold method.

That would be a pretty dumb thing to do. Depends on the year of the vehicle.

you forgot way too much info there slick all motors have different systems try again with info year, motor, model