I have a Campagnolo Croce Daune hub fitted with a Sach 7 speed freewheel. I want to fit this wheel into an alloy frame that has a 130mm dropout.

This has raised a couple of issues,

I'd really like to run an 8 speed freewheel, but I'm pretty sure I have a 126mm hub so its pulling the drop out together. Can I use some kind of spacer to correct this?
Can anyone see any problems with fitting an 8 speed freewheel? I just need some advice on whether its going to work before I buy anything.