Look at section 11-13 sheet 8 and sheet 15 for details.
Sheet 8 shows the placement but references the 40 and 32.5 body lines.
The 32.5 is off the car centerline (hood center assuming it is centered).
The 40 is off the tab of the fender mount. It is marked 0 on sheet 15.
Don't get confused by the two holes shown on sheet 15 they are not the ornament holes.
Also every dimension is straight and square to an imaginary 3 dimensional matrix around the car. Do not measure laying the rule on the curved surface.
Make sure you use a step drill and not a twist drill.
Oh and thanks for the oversize wheels... One of my engineering buddies back in the 90's tried to talk me into larger wheels for my bubble but I stuck with stock diameters.
He was right they do look nice...