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

You might try .019-.022 and leave feeler gauge in place while tightening lock nut. If you can remove the feeler gauge, you should be in the ballpark. I don't mean to be a wise guy, but you do realize you have to use the screwdriver to keep the adjuster from turning while you tighten the nut? Valve adjustments are pretty much a thing from the past and don't apply to most modern cars, foreign makes possibly excepted.Not everyone has done it.I grew up around motorcycles that used screw adjusters and still prefer them to shims, even though they have to be checked more often. 

Using all your strength trying to hold the screw driver left while turning the box wrench in the opposite direction is a contest I assume you have not yet experienced.

1955 312 T-Bird Warwick, NY