I noticed a tick in the valvetrain so I decided to investigate and iI found a rocker to be eaten away about a quarter inch into where the pushrod goes into the rocker. I have extras but they seem to have alot less material to them. The heavier ones have a "68" cast into them while the waker looking ones have a "456" and a "D" on one side and "608" on the other side. They seem to be the same ratio and the heavier ones are brighter looking while the others look black. I use my truck for truck pulling in the summer so I would like to use the stoutest pieces i can find. are my rockers aftermarket? are they a special year? I just Redid the heads in shop class with a 3 angle grind, new springs, 124@seat and 278@1.300, head shaved 15 and cut 15 off the valve tips.

Does anybody have adjustable rockers they would be willing to sell?

Thanx in advance

 

I bought my adjustable rockers at dscmotorsport.com. They are the stock pieces. Your ratio will change from 1.73 to 1.76 if you swap.