[Spits] Rocker Shaft Pedestal Shim

[Roger Elliott]

Hi,

At what point does rocker pedestal shims become necessary?

I have a 1980 Spitfire 1500 that I had quite a bit taken off the head.  
It is still taller than some of the earlier heads.  As far as I can tell 
they used the same push rods, pedestals and valves even when the heads 
were shorter. So I am thinking there is enough adjustment in them that I 
don't need shims.

Thanks,

Roger Elliott