I clamped front of cabin braces in place and took pictures to email to Bushcaddy to check if this is the right orientation for these new gussets as there are no drawing for them. After emailing Mike at Bushcaddy and confirming that F-138-T and F-138-B are the new parts and getting a confirmation back I found out they were the right parts and that I had placement right but the bottom F-138-B should have the small end to the firewall. I placed F-138-B the right way and drilled rivet lines and deburred and primed all parts.