Cheers guys, the Chassis is fine for this project, for our laws we must use the factory frame, I can do custom but added cost and time makes this the easiest way. I'm replacing all crossmembers so there is no clearance issues with the front crossmember.
Here's the height of the C20 its at 14 inches measured at the frame under the cab.
I'm just wondering if someone can give the same measurement on a truck sitting at this height ( Tire height and rim size are factors, im just chasing a ball park figure) I can't fit the Cab yet to check and im still waiting on tires from the USA....
Cheers Tim