pcv sucking oil ?

i noticed my car puffing dark smoke during hard throttle, and b/t shifts (4/spd) ... pulled plugs and found fuel fouled. compression even on all 8. replaced all plugs, rebuilt holley 770, adjusted timing and carb. drove car today and still getting a nice puff out of both tips. hard to pinpoint with bank due to h-pipe. I pulled the pcv and found the inside nice and oily ! any of you guys sucking oil through the pcv valve and blowing it out the exhaust ? only happens on hard throttle. factory valve covers have baffle .... thanks !