1. REad all the pages in this thread:
http://www.clubcobra.com/forums/showthread.php?t=68752&page=3
It's about what I went through to get my Cobra properly registered with NYDMV.
2. read this:
http://www.nydmv.state.ny.us/homemade.htm
and print this:
http://www.nydmv.state.ny.us/forms/mv529.pdf
3. Note that you will be dealing with 2 separate departments in the DMV. The Field Investigations Office (for assignment of VIN and necessary examination), and the Technical Services Bureau, that will determine if the car is OK to be registered after compliance with NY Highway laws. These 2 offices don't necessarily talk to each other. The Tech Services people are nice and very helpful ("Services"). The Field Investigations people are like cops ("Investigations")
4. Be careful what you ask be put in your invoice. Less is better. They're looking for the $ you paid or taxes if any, paid. They'll base your tax liability at time of registration on the total $ paid. Send copies of all receipts, Bill of Sales, and MSO with forms and backup papers below.
When you get to the engine section of the form, then that's where you put: "
1966 Ford replacement motor". If Roush can put "replacement motor for 1966 Ford" on their invoice, that would be MINT! Then fill in the blanks (1966 under year) and same serial number as on invoice for motor. No more, no less, so your car will only be required to meet emissions standards for that year. Print out the spec sheet page from Ford Racing Parts website for your base motor, (the Roush would be the SB crate 351) and append the sheets when you send in the form. Do the same for available tech sheets for the transaxle.
5. The form that you get with the application kit will ask for the DOT/SAE numbers for equipment on the car. Note where it asks for DOT#and AS rating on the glass, put N/A on side windows. On lights, also pit N/A on sidemarkers. On Emissions control Devices, just check PCV, leave others blank. Check everything in Brakes and Other Equipment, including padded dash and visors. You're only required padding if you HAVE visors. The GT40 does not. The SPF has hazard lighting and reverse lights, I think, otherwise, you'll need to have these installed. Get an invoice from installing facility describing this installation or an affidavit if you did it yourself and include in backup papers.
6. You'll need 4 pics of the car: front, rear, and both sides. This is VERY important to get right. They look for certain details.
7. You need to get the car weighed at an official NYS weighing station where you'll get a weight certificate.
At the same time, you'll be sending the application for VIN assignment Form 272-1 that came with the kit to the Field Investigations Office, who will then send you back an appointment letter for the examination facility nearest you. Trailer the car to the facility and give them the appointment letter ONLY, but have the original Bill of Sale for the Roller, motor and transaxle AND the MSO (Manufacturer's Statement of Origin) with you to present if asked for it. When they assign the VIN, either you'll get an approved copy of the form 272-1 or they'll tell you they're faxing a copy direct to Tech Services. Send this copy, or a note signifying that a copy has been sent to them, with all the other forms (see 5-7 above) to Tech Services. When they OK the car, you will get a form VS103 and a copy of 272-1 which are the 2 necessary papers you'll need along with insurance card, inspection (safety) receipt, Bill of Sales, and MV registration application forms to get your plates and title/registration card.
If this is still daunting to you, EM me and I can probably help further.

epper:
Please note the above procedure tips are based on my personal experience and may or may not be necessarily correct so don't quote me or hold me responsible...

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