You will likely have to remove the rocker boxes. The foot of the Mushroom adjusters I have had will not fit into the threaded hole of the rocker arm and therefore needs to be screwed upwards from the underside of the rocker arm.
The mushroom adjusters you should use are copper plated them machined to expose the valve contact surface which is them case hardened. The contact surface will be grey. The rocker boxes will need to be remove for installation.
Thanks for the advice fellas. With the tappet spanner you can buy (the one like a tube with handle and another tube that fits in the end that adjusts top of tappet) does anyone know if they come with alan key end and if so where you buy them.
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