a cam has a wiped lobe? Lately the 302 in my 68 Cougar has been running like absolute crap. AFAIK it's pretty much stock with long tune headers, a Performer manifold, Durapspark dizzy and MSD (installed last summer) and a Street Demon Jr 525 cfm carb. Timings set at 14 deg btdc with a total of 32 deg total advance. New plugs last week (Champions-possibly crap?)The past week she's been missing/popping through the exhaust really bad at idle but not under load. If I "fattened up" the idle mixture screws the popping went away but so did idle quality and mileage. The past two days I've seen surging while driving (jets too big?) and it won't hold an idle. I tried tuning and re-tuning the Demon and finally just swapped a Holley 1850 on to see if the carb was at fault and the missing got worse I haven't tried to dirve it with the Holeey yet. It's difficult to start when cold (have to pump the pedal while cranking and hold the throttle open), when it would normally just fire up and idle beautifully with a turn of the key. HELP????