looking at the tyga sub frame the lower mounts onto the frame look to be pretty similar. and on the top ones that mount above the shock,you could quite easily extend the box section to reach the original mounts on the 18 frame, just use small box section and insert it into the tyga sub frame and adust it to length and angle of the seat unit. the either bolt it all up or weld it. jobs a good un.
plus by using the tyga kit you get the mounts for the reg/rec ,battery and pgm unit.[/img]