I have an Isky Model: 301444 cam in my 312. I’m wondering if anyone out there might have one and if so what your timing is set at. Also Isky recommended a hot valve lash of .015. I assume that would translate to .016 cold, am I correct?

1955 312 T-Bird Warwick, NY

The jam nut adjuster is one of the two methods of holding the adjustment.  This requires a wrench and screwdriver (or allen wrench for aftermarket rocker arms or screws).  The other is with interference fit adjuster screws, which only require a socket or wrench.

The interference adjuster eventually becomes loose and the jam nut adjuster is best.  It does take some practice.


Lawrenceville, GA

I concur with Charlie. Mummert has both types of adjusters, but those/w nuts are more expensive. I think Crane has/had the self-locking adjusters (no nuts) that got good reviews.