to be legal i need to.
have photos of the build and reciepts for all parts.
then jump through these hoops.
The main issue in getting a registration or title for a kit or rebuilt car is acquiring a vehicle identification number (VIN). If the vehicle is homemade, or the rebuilt model's VIN is missing or distorted, the state will assign a new one. The Colorado State Patrol (CSP) will then physically etch the number into the vehicle.

Steps to Getting a Colorado Assigned VIN
The first rung is having the vehicle inspected by a law enforcement official. This official will also fill out a form DR2365 which directs the emissions assessor on how to check the vehicle. The inspection fee is $20. Call your title and registration office for a referral list. While you have them on the phone, double-check whether the inspector will have the DR2365 form, or if you need to stop by the office and grab one. You will not find the form online.
If the vehicle is a home-built or a kit model, you will complete a Colorado Assigned Vehicle Identification Number Declaration of Facts form and then apply for the number by filling out the Application for Colorado Assigned Vehicle Identification Number (VIN). The fee is a $3.50 fee for this service.
Once the number is assigned you will take it and the completed DR2365 form to an emissions testing technical center operated by the Department of Public Health and Environment (CDPHE). For information or an appointment, call (303) 744-2442 (and press 3).
Passing the emissions test (if necessary) is the final step required to prepare the vehicle for titling and registration. From here, the process is pretty much the same as with other vehicles. Expect a $9.50 titling fee.