OK, it's been a short while but I finally got a REAL copy of the Massachusetts so-called "SEMA" bill.
In short, there are two categories of cars addressed that we can worry about:
1. Street Rods and Customs - ALL of these cars receive an emissions waiver. They only need seat belts if they are 1966 or newer, but the DMV welcomes any and all safety-related additions so go there with seat belts installed.
2. Replica vehicles shall be titled as both the year in which they were built and the make, model and year of the vehicle it is intended to replicate. It shall also be subject to emissions control requirements based on the vehicle model and year and configuration of the engine installed, whether the engine is an OEM production installed, rebuilt engine or crate engine.
If the model year of the engine installed in the replica requires an on-board diagnostic system, the vehicle shall be subject to an on board diagnostic system emissions test applicable to the certified configuration. So, this is a little ambiguous - I don't yet know that, if you have a 2005 Subaru installed in your 1957 replica, with an OBD II port, it will be emissions tested as a 2005 Subaru with that engine configuration (2.2, 2.4, 2.5cc, etc.) or as a 1957 engine and be smog exempt. THAT, I'm afraid, may fall the the judgement of the DMV officer you deal with. I'll dig a little harder on this one for you all. In the meantime, you do not have an OBD II port on your car. Remember that.
While this sounds pretty straight-forward, believe me, the Massachusetts DMV folks have made it about as complicated as they possibly can, referring the inspections (mechanical, safety and initial emissions inspections) to a third-party with several offices around the state. While you might think that they should have some universal degree of experience with different types of custom/replica cars by now, that does not seem to be the case and everyone I've talked with across the car spectrum has brought in something "never-before-seen" (except for the Cobra guys). Part of the initial inspection is to insure that the vehicle was not built with stolen parts so there is a thorough going-over done. I have no feed-back on this inspection yet.
Those of us with pan-based cars should, for ease of the process, continue to simply register them as the year of the VW pan and then all you need are seat belts (but you should have those anyway.) If the replica model/color does not match the original VW, you have the option of a submitting a DMV form changing the color/model (say, from a red sedan to a white convertible) and you're done. If you have a tube-frame car (Beck, or IM ) then I would register it as a Replica Car, then you should be exempt (at most DMV offices) from emissions testing as the engine essentially replicates a 1970 VW air cooled engine, and certainly a 1957 Porsche engine. NOT ALL MASS DMV OFFICERS WILL SEE IT THAT WAY!
I'll try to get some clarification on this in the next few weeks but it looks as though it is possible to register a replica, as a replica, in Massachusetts. I wish it were easier, but that's our beloved state. It makes a BIG difference, thus far, as to which DMV office you visit and which state-sponsored inspection facility you visit (you do not have to go to either one closest to you - you can go to any one of them).
The full document, signed by Hizzoner the Governor, Deval Patrick, follows as a PDF - it should load if you click on it: