Originally Posted by
Discobaker
I guess it's kinda the same as bolting a 5 speed Celica gearbox to the back of a 253 or 308, heaps of people do it but it's technically supposed to be engineered to get it registered, the original structure has been altered. It was a 3 speed box from factory, now it's a 5 speed. Hot rod builders quite often will use a HZ, HQ Holden chassis & running gear then drop a 56 Chevrolet pickup shell over the top. Have a look at the rego, it's a Holden HZ, but it has to have an engineers cert to register it.