hello, need some help here i just put in a 350 with 2000 miles on it ran great when i looked at it,now it idles fine but when i put it in gear it dies i can keep it running if i push on the gas,all vac lines have been checked timming is right on anybody have any ideas?

Recheck your idle rpms to match your ingear. If its an automatic, you'll have to set your idle when in gear. Otherwise, check for a vacuum leak at the base of the carb. I'm going through the same delima now.. Just had my base plate crack at the front.