I think "Snapper" has raised a very good point indeed.
Whilst I,m personally always happy to give info from my own build to be used as a guide/suggestion etc I would hope any builder would check the IVA regs/rules etc to ensure their own build is within the requirements of the IVA regulations.
My apologies if any info I have given is misleading or incorrect to anyones own build, but as there are so many possible differences within each build ( such as seats used, height of runners etc) please take the measurements that I have given as nothing more than how I have built my own car & not as the way to do it on all builds, due to so many possible deviations as mentioned.
Well said "Snapper"
cheers
andy