heres an odd one for ya.....

my 71 dart..... 318 running an M1 and a carter AVS 625cfm 4bbl, MP electronic iggy conversion, auto and 8.75 rear, has been acting up recently. it'll idle ok, not perfect but ok, and if i actually drive it for more than 10 min it starts poppin vacuum caps off the carb and the brake booster causing it to fall on its face. carbs been rebuilt, intake gaskets have been done, new plugs (NGK V-power stock heat range), new wires (accel 8mm), used MSD coil (out of my 68 dart), new cap and rotor, new used iggy control modual ( changed 3 times thinking maybe thats it, with known good units. truck, scamp, and 73 dart) new starter relay, new regulator, fairly new alt. timing chain was done bout 15k ago. i am at my wits end.... any ideas??????

oh this car shows 71k on the clock but its more like 171k and other than the intake and timing chain the motor has not been touched that i know of. previous owner did timing chain bout a year before i bought it and he hardly ever drove the car. hell i hardly drive it now since this happened but i had it sitting for about a year due to front brake issues.

any help on this would be great.... i could really use the car right now with my truck down for motor work.....

thanx again!!!!