Engine: 455: 430 heads/'76 block no oil passages blocked. Ok, I have searched the posts here and found out there is an oil passage to be blocked in the block. Is it the one in the front of the block that comes up from the cam bearing? Is there any posibility of oil in the 430 head leaking out of the passages the were for oiling through the rockers? I have a weird leak only when the oil is under pressure, seems to squirt out the head gasket area straight onto the exhaust down pipe, making embarassing and stinky oil smoke. Otherwise the engine runs so well I can hardly stand the thought of tearing it down to plug the oil hole that may or may not be the source of the leak. Oil pressure is 60 normal operating, 600 rpm idle its 15 to 19, will go up @WOT but things are happening that conspire to keep me from watching the oil pressure when that happens so I'm not sure how high it goes!
I thought the oil passage was in the 430 heads that you need to block. But then again Ive read in some threads people not blocking them, and no problems.
