I redone top end , new rings and gaskets. The front cylinder has 25 pounds of compression rear has 160. The head were cleaned and install new valve steam seats. Rear cylinders great, front not. I see the valves move in the front cylinder up and down both intake and exhaust. The push rods spin turn easily also the are OEM stock pushrods to. The machine shop did both heads. I'm so lost on this. I took the front jug apart rings are ok and fitted right. Valves are closed on the head. Don't see no light around the seats. Any advice? Thanks. Would a collapse lifter cause low compression of 25?

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