I own a 79 GMC Jimmy with a 350 and a rochester carb, no cat, but it has all the 1970's emission garbage vacume hoses still attached. I want to install cats on the dual exhast and strip all the vacume hoses that are not nessessary. If I do this would I have a prayer of passing emissions? I am also considering changing out metering rods to make it run a little leaner.

Any advice is welcome.

Thanks,
jeff