I shaved my head about .080", and I was still able to use the original pushrods.
Be sure to have the adjusters screwed all the way up.
Ideally the rods should be shortened. The vendors sell hollow pushrods
where you can remove the ends and trim the tubing, but I have no idea
how well they work or of they are really necessary.
If you raised the rocker arm shaft with shims, it would get too high relative
to the valves, and the geometry of the rocker-arm-to-valve-stem would
be off.
Doug Braun
'72 Spit
At 09:22 AM 2/15/2006 -0500, you wrote:
>Spitfire Lovers.....
> I have a question for you engine gurus...
> I had the head on my 1972 1300 shaved .035". New valves. New guides.
> Now, will I have an issue with the push rods being too long? Can I
>compensate for this by shimming under the rocker carrier an equal amount or
>is there an enough adjustment on the rockers to accommodate the lose of
>thickness of the head.(to adjust valve clearance)
> Also at one point we had a discussion concerning retorqueing the
>head studs after removing the head. Correct me if I'm wrong, torque the head
>studs cold, fire it up to operating temp., then loosen and retorque studs
>with head hot.
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