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- - valve tick (https://67-72chevytrucks.com/vboard/showthread.php?t=342931)

300 miles into my rebuild, got some nice valve ticking, and it shifts 1-2 (powerglide/holley, vac based) way soon.

How to fix?

VALVE TICK: do you know for sure that you have good oil pressure? How were the valve adjusted? are you sure it is a valve tick? There is a very good way to adjust the valves with the engine not running, that has been posted here by me and others. It is the way that I adjust valves an SBC chevys.

I would assume that the powerglide has a replacement vacuum modulator in it. If you pull the vacuum line off of the modulator and look inside the vacuum fitting you should see a slot to put a small screw driver. might suggest truning it in I THINK a turn or two and see if it makes the shifts later.

take your valv cover off and see if there are any rocker arms that are sloppy and tighten it up a little bit , but not too much.