The '62 hinge has a short 6-8" bolt pattern on the body where the 63-65 is probably 8-10" long. The 62 Spring is short and fat, the 63+ is longer and thinner. Pretty sure you can add a nut and use the later hinge.
Also, be aware door latches are different as well. Other than trim, most parts interchange easily.
Thanks. I am almost finished installing a Checkered Racing front end on the car.
The hinge brackets come with holes for both style hinges, I am at the point of putting the hood on now, I just wanted to make sure the 62 hinges locate the hood in the correct spot and actually bolt to an aftermarket cowl hood. I'm waiting for someone to help me try to put the hood on.
There is more fabrication to this front end than I thought there would be, but I just about have it now.
GET RID OF THE 1962 HINGES!!! If you have the opportunity to move to the 1963 - 64 hinges do it. Nothing is available for the 62 hinges that I am aware of and according to the GM parts book they are Nova only. They tend to wear substantially more than the later hinges.
The 1965 hinge is different than 63 - 64 but will interchange. I can never remember what is different, I think it used a different spring.