Matt,

Do the notes below that chart specify to run an intake clearance of .008, if 261 will be used for "severe duty"? I seem to remember reading something like that somewhere...

My Delta cam specifies a .008 intake clearance, which I assume has to do with the lobe ramp design- but am not sure. It definitely makes the valve train a little noisier.

McGurk was running .015 for intake and .016 for exhaust lash in that Soup That Chevy article.

Last edited by Norcal Dave; 11/01/2017 2:11 PM.

~ Dave
1950 Chevrolet 3600 3/4-ton with 261 engine & T5 Transmission