I have a new project with a 80s ford 302 in it.. it came with a 2150 2bbl on top of a 4bbl weiand intake using an adapter, original 80s duraspark box, original 80s duraspark dizzy ( which had a busted vacuum canister on it.) I pulled off the smog pump, put vacuum port covers over the 2 vacuum towers unused on the back. replaced the 2150 ( it was not any good ) with a Summit Racing Carburetor. replaced the distributor with a new Duraspark distributor not a reman. new plugs gapped to 45 I had an MSD streetfire box .. so im using that. problem I'm having is when I set Idle down to around 700 or so.. it purrs fine.. put it in gear .. ( ford C6) it will almost immediately fizzle and die. Set curb idles up to 1100 put it in gear and it is perfectly normal and happy. Timing is set to between 12 and 15-- it seems very happy there. I am told by a few some motors just want to idle high just let it be.. but to me.. its wrong. My old f100 with a 302 idles like a champ at about 700 curb idle and doesn't really drop much when put in gear.. just the sound changes a bit. ( no tach ) I have set the idles mixture screws using a vacuum gauge to achieve around 20 on vacuum holds steady. What adjustments should I do to get this thing to idle correctly in and out of gear. The summit carb is Just a Holley carb with a different bowl design. uses all holley tuning parts. Summit tech recommended changing a power valve down to 6.5 ... but im not sure that is right.. but im not carb guru.. It runs smooth as silk and pretty responsive.. it is a 500cfm unit with annular boosters. floats set to the middle. thanks. appreciate any advice other than rip off the carb and put on another one. lol. too many folks have great success with this one..