1972 Dodge Colt

The easy to see one is 5/8 till it hits water.
I am thinking mcmaster carr studs and opening the rocker shaft holes maybe to the next drill size.
That should allow it to clear the studs going on.
I talked with Will and he mentioned with his roller he has very high spring pressures.
It makes it a challenge pulling down the rocker shaft.
His torque on those bolts are around 70 Lbs.
Mine are at 25-30 so pulling a thread out is a distinct possibility.

But since I robbed the spring stuff for the head at the shop, this will be a project for the summer.