For stock rods , it is better to retain the press fit design. Aftermarket rods are designed for a bushing in the small end.

The 981 springs from comp will swim around on the stock valve guide boss. It is best to control the spring on top and bottom for better valve control.
Look up videos on youtube for spintron valve springs.
My springs work great.


Inliner Member 1716
65 Chevelle Wagon and 41 Hudson Pickup
Information and parts www.12bolt.com