Monte: The lower cross bar and angled supports are copied directly out of the SFI book (pg.13 25.4B manual). The only difference is that they have 2 lower uprights from the lower crossbar to the rear frame crossmember, but that is for a four link setup. My ladder bar crossmember is way too far forward for that. That is why I added 2 more diagonals going inboard, to support the funny car hoop. Also, I have an additional upper crossmember in the hoop. That was mostly by mistake, working off of how the bar gets put in when just building an 8 point roll bar. Decided to leave it for extra strength.