Cleaned and opened the front oil drane back hole and cleaned out and smoother the rear oil drain back holes
Three pass through ,the fourth is about 3/4 so header bolts through the exhaust flange should be no problem. I already ran a tap through to clean them out ,390 and 428s are bad about welding in exhaust flange bolts and not fun to remove when they snap off trying to remove them . I will take them in Monday and see what it takes to clean them up .
Screw that tree and chain saw ,I ordered my cam and lifters anyway ! Also ordered a true roller chain and gear set . Next on the list ,a new Cobra oil pan and cobra valve covers . This sucker is going together !
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