the stock jets were 49 I went to a pair of 45 jets. Like yours, mine was running way rich, at times it smoked I bought every size of jet pairs from 42 to 55. Note: Holley jets don't fit, you have to have ford jets. Yes, I had a nice looking 2 bbl Rochchester. I began with it but it did not work well. I could not keep the engine running smoothly under 4000 rpm using it. After the initial startup and cam break-in I removed it. I had a several autolites from a previous engines and some worked excellently, thus It was a no brainer to change from a malfunctioning carb to a known good one that I was familiar with. (And my 289 Mustang routinely got 28 mpg with its Autolite, on the road.) Autolites are simple so tuning them is easy and the smaller ones flow right for this engine. See my application chart above before buying one if you go that way. If you have a good Rochester, you could just rejet it. Or you could buy a rebuilt one and return it promptly if it isn't right. I have used Autolite and Mikuni carburetors for 48 years. I like both makes have accumulated parts to work with. I can't say that I really "like" Rochesters but some quadrajets have worked very well for me., Keihein and su carbs I dislike. Weber I like as all of the parts are available and they seem to work well.