Silvertop Install, Clutch Flywheel problems, please help!!

[byd1380]

I installed a Silvetop in my MG midget, previously running a large port 4AGE. I installed the original gearbox and fitted a new clutch kit. The problem is, when you press the clutch pedal and select a gear, then rev the car hard (4-500rpm), the car jumps forward as if the clutch has been released. I have taken the clutch apart and nothing obvious seems to be wrong. I am now concerned that there is movement in the flywheel. If I get a large screwdriver and place it between the block and the flywheel I get slight movement, is this normal?

Thanks

Ivan