Wiped cam lobe on big block

 
Indycars said:
Working part time in 50-70s car shop sound like an excellent way
to stay active and earn a little money.
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Yeah, it's a little extra spending money for home and pickup improvements. Sometimes it can be intimidating working for a guy who has 30+ years as a Ford and Lexus mechanic. But on the other hand I'm learning new tools & tricks and how to work smarter. And he actually comes to me with questions about Chevy engines -- small blocks until now. It's really hot at the shop from May to September, but l lost 10 pounds last summer which sure beats being a couch potato, and having my wife give me "honey-dos" every morning!
 
Here's the latest: Springs are OK for the .500" lift cam. At approx 1.85" installed height, they don't coil bind until approx 1.25". The bad news is I think I have too much lifter pre-load. With the lifters on a cam lobe base circle (TDC compression stroke), when I tighten the rocker arm bolt, the lifter plunger compresses around .055" (about 3/4 turn from zero lash with 3/8"-16 bolts, which is approx .047" at the fulcrum.). Am I going to need a stud kit or shims to decrease preload to .030" or so? My concern is the lifter plunger is close to bottoming out.

Just occurred to me that maybe I should have done the intake closing / exhaust opening method to ensure lifters are on base circle. Since I don't have a BBC crank turning tool, guess I'll have to put the damper on part way. Brain fade!
 
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