It looks like the round ball on the adjuster just back from the center connector tube is completly worn away. I'm sure more are that way. This is from lack of oil.
The only way to tell for sure if you have early (1953-58) or late(1959-62) rockers is to pull one off and look inside and see if the groove inside is centered (early) or offset 1/4"(late).It is easy to pull the end one just by backing of the adjuster.
If you want it set up right, now that your using the drilled head bolt, you should use a connector setup that has the loop tube that dumps on head. What you have now will force more oil to rockers, which could cause oil consumption.
