[borrone821]

Hey guys,
About to cut up my 69 quarter. Have the skin from Goodmark and was wondering if anyone had a good template or idea where to make the cut. Everything I've read on the A-bodies says the coupe vs. convertible quarter begins to differ about 6 inches above the wheelwell. Is that above the lip or where it begins to curl? Is there a good way to ensure it's a cut parallel to the ground, because I have no other reference and the 1/4 botttoms aren't parallel.
Any help on how to cut these up would be greatly appreciated.

Thanks
Jim