[crakarjax]

I think creating a simple box under the floor that spans the original belt mounts would be plenty strong. The engineer the mounts to hold the weight of pretty large people, so unless you are like 350lbs I wouldn't worry about it. Much more detrimental to safety would be the lack of crumple zones, airbags, etc -- I'm going to put a roll cage in mine so that I won't have to worry when my kids drive it. Sorry, a bit off topic!