'54 Y-Block push rods

[40 Deluxe]

Originally Posted by KULTULZ

(IMO) -

You set all cyls cold to get them somewhat in the ballpark. You then start the engine and bring it to operating temp and then go through them again hot.

You can adjust while running with just a feeler gauge but it takes experience and perseverance as the early FYB had two piece adjusters and that is difficult to keep up with. If you were an experienced LINE TECH in the day, you would do them while the engine is running to make your flat-rate.

Again, the FYB is infamous for rocker tip wear that will give incorrect feeler gauge readings. If that bad, you would have to replace or have faced.

Not to mention that those worn rocker arm tips would chew up a feeler gauge in no time if you tried the engine running method!