I'd do what John suggests. Find where you want the body posts, drill them out, cut the shell to the lower lines (not above, against the Rules!), trim out the rear section and then compass-cut the front arches. Now you can see where to remove the paint so you can see through the to rear wheels. It helps if you put a dob of snowpake on the end of the axle (each side) to make it easier to see. HTH
