Easy to pass the dyno test for turbo/supercharger upgrade. Just dial in less boost for compliance and then up it goes afterward. Who can ever tell how much boost you are running. (yeah, I know, look at boost guage
) Yeah, it's also very easy in QLD to get 4lt engine approved with force induction in a Cobra. Anything larger and it gets a lot, lot harder.
Yeah, a DRB would be cheaper as it runs Torana front arms/cross member and you could initially fit a Torana diff or find a shortened Ford 9" out of a Torana. Seen DRBs with Lexus engines, a guy with a DRB even used the electric tilt/adjustable steering column out of his Soarer front cut. It was cool to see it move up out of the way when engine was turned off.
Harrison would be more expensive as it uses custom front A arms and require more expensive rear end. Classic Revival as by the looks of it, a more expensive rear end again.
With these kits you do get more for extra money. Some would say a lot more.
DRB is also made to accomodate Ford modular(DOHC quad valve) 4.6lt engine.
All kits fit 302 Windsor.
Body/Chassis units are all roughly the same price.