Rough-idling 360, can't figure it out!

Guy gave me 8 LA cams when I picked up an intake, told me take em for scrap. 4 mic'd clean and even (2 318 stockers, an SSI .440 and an Isky 'Turbo Grind'), and the others looked like roller lifters like G. Jets pencil pointers. Just lbs of iron scrap. A rhythmic loss of ignition sounds like...ignition.. or possibly carb loading up but that usually takes longer to manifest itself. I took off every hose on my carb looking for a leak. The EGR should not open on high vacuum idle (not applicable but good info).