Henry's 70 Dart Swinger

well I tried everything. from 0 degrees going up in increments of 5 degrees all the way up to 60. adjusting the carb in between timing adjustments. it absolutely will NOT run in drive. the best I can get it is at 20 or so degrees and 1500 idle and then MAYBE it will idle at 900. but normally it will dog out up and down between 500 and 300 rpm on the gauge. it shakes and rattle and bocks. I have good vac coming out of the timed port...plenty to move the advance.

i'm pretty sure this carb is a big pile of ****! we are going to rebuild the old carb tomorrow and see if it makes any difference...if so, this new one can go back...maybe it is too much cfm??? its the 650....maybe I need the 500???

I don't know...i'm at wits end.