Blowin oil out the dipstick??

[sir_talk_alot]

Hoping you guy can help me. My buddy has a 94 4x4. His 350 blows about a qt of oil out of the dipstick in about 30 mins-1hr of driving it. Before the dipstick it was blowing out the rearmain so he installed a new rearmain and now it blows out the dipstick tube. I know its over pressurizing, it has to be. Just cant figure out why. The pcv valve was cleaned. Any ideas? Im guessing theres maybe a clogged vent somewhere we have over looked. Thanks in advance.
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