A good 10.5 outlaw chassis shop should be very familiar with 10.5 rules. From my experience you have to have the firewall in most all classes. Not much to loose there anyway. The shock towers can be trimed as long as the upper strut bolt-in is stock. You can cut all the frame away except where the lower control arms actually bolt up. On K-member cars sense the K-member bolts in all of this can be tubular.

But, that said these 10.5 outlaw real car classes are falling by the wayside and are extremely competitive. 4.40 1/8 mile or stay home. A true 10.5 or radial class is fast but, they seem to be the bright and shining star right now.

Leon