Due to a neck problem I really need to fit inertia reel seat belts, ideally ones from a suitable doner to help keep costs down.

I've seen reference to mounting the inertia reels centrally rather than on the outside as per normal production cars.

Has anybody details of how they mounted theirs to comply with SVA/IVA?

Also, if I do go for a 3-point belt will this create a problem at track days?

John.

After market belts (securon comes to mind) can be mounted at almost any angle, you just need to get the adjusters lined up properly.