TR4/4A Rocker shaft spacer clearance with pedestals

[Cadave]

I have decided to install steel rocker shaft spacers on my TR4A engine rebuild. There is a split opinion on their value but I decided to go with them. I received a set from Rimmer no instructions but it’s pretty obvious where they go. The important info I need is what should the gap be between the spacer and the pedals. This can be achieved by the use of shims and tweaking the pedal location a little when clamping them down. I searched the WWW, and found various threads in the topic from minimal gap, whatever that means to .010 which seems large.
Does anyone have any knowledge on what is a good running clearance without getting bogged down in thermal expansion explainations
Thanks

 

[bobhustead]

I've been mechanicing since I was 14, now 74. Don't see the purpose and neither did the factory.
Bob

 

[malbaby]

Important to adjust the spacing so that the rockers centre on the valve stems....0.010 total clearance seems ok to me.
Mixture of solid and spring spacers also ok.

 

[mctriumph]

""Far out Catherwood"You can sit here in the waiting room ,or wait here in the sitting room"
I hope this answers the question......if there was one at all......
Mad dog