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I make a BBC HR that is 251 at .050, .660" valve lift, as a single pattern cam---BigRedL72 ran in the 10.70s-10.80s with it in his 496, and it is a daily-driver.
I can also make a 251/259 at .050 with.660"/.660" valve lift, but I do not have any runs reported yet.
These are available with the EverWear Gear.

UDHarold
 
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