[ghettosled71]

im having problems getting my car to idle in gear. it doesn't want to idle in neutral under about 1100 rpm, and when i put it in drive, all it wants to do is fall on it's face. long story short:
71GP, 10:1 406, 670 heads, 220/230 @.050, 476/507 108, stock rockers, adjustable rocker nuts, what i believe to be a original torker, edelbrock 750, summit cheapie headers, 2.5 flowmasters, 2600 stall, TH400, stock rear, open/2.73 i know i need 3.73's and a posi, but that's coming as soon as i can. timing is at about 14 initial, distributor is a stock hei with all the summit internals (my summit piece wouldn't fit on the oil pump shaft) spark plug gap is .50. how important is the grommet on the valley pan as far as vacuum leaks go? the grommet was wasted, and i just went down and got a PCV style grommet that fit in the hole OK, and a generic PCV in that. that is the only thing i can think of to trouble-shoot. and ideas?