hi, newbie here....I saw a link to my picture (the carb jet orifice), thought I'd see what's up with it? Anyways, thanks for the GM part number for the orifice, I'll have to get a few of those. I'm running a PAE 3000 stall in my 55 chevy, 60' time is about 1.7 on a 12.0 et on drag radials and 3.25 gears. I like Buick converters.