I tested mine directly before and after the cams, so direct comparison, new poncams, new rockers and that's it.
thought I would update this with some feedback incase anyone wondered what the effects of just fitting higher comp over sized pistons was.
in the handful of times I actually drove this last year I found that it would over fuel then cough/splutter and foul the plugs if driven aggressively, seemed to be fairly ok if just cruising around with moderate acceleration/engine breaking.
I didn't have a wide band or any other logging equipment fitted at the time so am not sure what is actually going on.
putting miles on a none road legal car totally sucks.