Pete:
Welcome aboard! I love the '65. In response to your questions, the hood, doors, cowl extensions, windshield and windshield cowl pieces, as well as the interior parts are interchangeable between the C10-C30 and the Big Bolts. The front fenders, inner fenders, radiator support, grille and grille supports are not.
I hope this information is helpful and you will find this site to be very helpful. There is a wealth of knowledge waiting to be shared on this site. Good luck with your project and Happy Holidays.
Tony
