Please do, your car was certainly quick enough.
I was running the small spur largest pinion in the 19t vintage too, 118/28 (64dp) but that was undergeared and lacked top end. I'm thinking 3:1 with the 540 but I checked last night and i won't be able to fit a larger pinion in, so I need to source a smaller spur that will fit onto the mms slipper layshaft.
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