There's more to it than manufacture. Every car is different. If you take an OEM front clip off another stang and bolt it on yours, it won't necessarily fit the same as yours did. That's just a day in the life of a bodyman. Sometimes it works, out, usually it doesn't. Cervinis just happens to have a better track record than almost everybody else does. It depends where you get it too- I've seen Cervinis products that were ordered from Mustangs Unlimited, and the finish quality was nowhere near as good as on the parts ordered directly from Cervinis. It's almost like they make a cheap line just for them, although the retail price is the same. I was just in a thread this morning saying that my Cobra Auto Designs hood ($250) fit better out of the box than my Cervinis hood (almost $600) did- although the finish wasn't as good. One other thing to consider in the Cervinis Stalker (urethane) vs the Age Classics Stallion (fiberglass) is that it will be way more work to make a fiberglass peice line up than a urethane one. If ALMOST STOCK had had the Stallion one and had those same problems with how it lined up, it would take him weeks of grinding and fiberglassing to get it right, instead of just tweeking the flexible urethane until it lined up and tightening it down. Fiberglass is absolutely unforgiving.