Replacing seat belt anchor bolts with harness eye bolts?

[TroubledSoul]

I'm just looking into this so that I can fit a harness to my road legal track car. Are the bolts for seat belts a standard size or do I need something specific to a Subaru?

I've seen these:
http://www.ebay.co.uk/itm/4-x-RSA-Harness-Seatbelt...

Would they by the kind of thing I should buy?

[TroubledSoul]

Well I was trying to find stuff that doesn't but the majority do and this seems the easiest route in all honesty. It also means I can fit the bucket seat on the passenger side and fit the harness later as it will be easy if the eye bolts are already there

[TroubledSoul]

Cheers folks. At present, I too intend to keep the seat belts for road use, hence looking at the longer eye bolts. Just not sure how long is right so I'll have to go trial and error I think.

[TroubledSoul]

Yeah you do have to be careful. My understanding is that the wrong angle is going to compress your spine in an accident and that can only go one way....

[TroubledSoul]

I am using a harness bar, but the harness is clip on so I'm replacing the lap belt seat belt bolts.