Llyod Elliot said I need to run 7/16 studs on my car, but before I start drilling and tapping, what roller rockers fit the center bolt valve covers in 1.6 7/16 stud? Also, what is the thread on the studs, 7/16-14 or 7/16-20? Thanks.

 

You don't need to drill or tap anything to get 7/16 studs to fit on your car. The top of the stud changes to 7/16 from 3/8 and i believe the part of the stud that goes into the head is already 7/16. You need to buy 1.6 rr's that are set up for 7/16 studs and everything will work fine.