Ok first I would like to say Hello to every one since I am new. I have a 1984 full size bronco with a 5.8L 2BBL with a Feedback carb. I have been working on cars all my life and have formal schooling in automotive. Here is my problem. I bought the truck with a bad intake gasket that was leaking water and caused it to be overheated a few times. I fixed that and got the truck running. I have done a full tune up also on it. It has a POS feedback carb which I know nothing about... Here is some symptoms I am having. On start up when cold it starts fine then begins to stumble while blowing white smoke out of the exhaust after a few seconds it go's away and runs smooth again. I can tell it's also running very rich it is getting about 6.2 mpg and has no climbing power what so ever. After a long drive I can smell the CAT converters which is probably melting my cats and plugging them.. Its not losing munch water maybe a cup every two weeks. On the highway its very smooth in tell I have to climb a hill then the pedal is to the floor to barely keep it at 60-65. When its warm and when I rev it up I get black smoke. I have to smog this truck sadly since I live in CA. What options to I have for getting rid of that 2bbl feedback junk and keep it smog able. It's driving me nuts If I could get 12-13 mpg I would be extremely happy lol. Hopefully one of you knows about these junky systems. I miss my 1989 Bronco that had FI!