I need some advice on mounting the seat in my little car. I can't use the stock seat because it has a high back and the shoulder belts won't fit right. My shoulders are about the same width or just a little bit wider than the seat. I have a racing seat but it sits too low so I'll have to install spacers and I thought, why not just mount it to the original sliding base? I didn't see anything specific in the rules about that but I may have missed it. This has had to have come up some time or other so if you can help, I'll appreciate it.