I run LZ springs maybe a bit much for a reground cam. Seems to be good so far. I have a fiber timing gear too. Keeping my fingers crossed.
https://www.jalopyjournal.com/forum/...prings.507288/
Drilling the valley valve bosses are to adjust adjustable lifters more easily. not for oil. If we are talking about the same thing....
My 221 has drilled bosses for easy lifter adjustment. Guess oil goes down there too from the valley also.
Less you have a extremely hot motor, you wont ever float a valve. Just my opinion.
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