So it seems that the MKIV 25th Anniversary body is slightly different than the prior MKIV body. If I understand, from another thread, one of the changes allows or makes it easier to use 275/40-17s in the front.

My intentions are to run 275/40-17 and 335/35-17s or the comparable 18s as that's what I'm accustomed too. Rubbing on the inside may cause a concern and be difficult to correct, on the outside, well, it's just fiberglass.

Can the changes be adapted to an earlier MKIV body? Fancy glasswork? Saber saw compass?