If by Z'ing you mean stepping the rear (or front) of the frame to get the car lower. It all depends on how much you want to step it by.
It its only the width of the frame find some styrene the same width as the frame.
Chop the frame at a point you determine to be right, glue the extra styrene to the top of the frame and the then glue the part removed (the part you want to step) on top of the extra styrene you added.
and adjust wheel base to suit.
Here's a crude drawning of what a z'd frame looks like from the side compared to the orig frame
I hope thats of some help.
Later, Troy
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My name's Troy, use it if you like.
If you're a Buddist, you go to Tibet....If you're a speed freak you go to the Salt Flats
351 clevo....aussie muscle