I wish my '68 looked that good. I have new rockers and cab corners ready to go when I am. I agree with everything above. If it is now your driver getting another engine to build would be nice. You need to build one while you have this opportunity. Northern has kits at good prices and I think you can still upgrade components like cams. The head work, a good intake/carb, cam, and exhaust will be the most improvement for the money. A GM HEI distributer will be good but can easily be added later. All of this done in moderation will still give you a dependable and efficient driver.