12 Second N/A Slant 6?

PowerWagon896 said

I'm think about using 7mm stem metric valves.

I want to stay away from the long stems on the 318 valves & the rocker arm geometry changes involved.

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If you are considering a cam with over about .525 valve lift, you just might "NEED" longer valves. The valve guides start to get pretty short, to maintain guide to retainer clearance. To say nothing of valve spring coil bind