My 66 Belvedere 2 cage is built almost identical to ModelmakerInc, I had to cut my dash and section the ends. I tried hard to hide my main hoop by installing it in alignment with my door glass window trim, only issue after the fact, I don't think I'm going to be able to slide my seat back far enough to be really comftorble (Bench seat car 6'2" driver) Keep this in mind, wish I had of. Things I'd do over: consider puting a curve maybe in the seat cross bar to allow it to slide back farther, swing out door bars, not run the bars straight back through the rear speaker panels, to visible in the large rear window. 8.50 will require window net, thats what I was told, need to install window latching mechanism.