[Igofastr]

Rich,

If you live in California, and go through the SB-100 process, it could mean a world of difference....depending on who is inspecting your car.

Why, you ask? Because the inspector may decide that since the MSO says 1966, the car must be replicating a model from 1966.

Why should that matter, you say?

Guess what device is found on most (but not all...depending on your source) Ford passenger cars starting in 1966? Don't know?

A smog pump.

Ever tried to fit a smog pump on a GT40? Since they never had one, there is no place to put one.

That's why you don't want your MSO to say 1966...just in case your inspector (or the head inspector, for that matter) decides that the date on your MSO must be the date your replica represents (even if it doesn't).

If that happens, you get to try to either prove that your car doesn't actually represent a 1966 model, or find a way to fit a smog pump where one can't go, or somehow convince said inspector that Ford did indeed sell a select few cars in 1966 without smog pumps, or find an engine dated 1965, have it rebuilt, buy a new clutch, flywheel, bell-housing and exhaust system.

That's why it matters.