318 2bbl won't idle without choke

True. I will add one thing that AJ made me think off. If that chain skipped a tooth (or many) and the valves kissed the pistons, you could very easily have pushrods that are no longer straight. And maybe even valves. Luckily the stock pushrods are only slightly stronger than wet spaghetti so they are usually the first to go. If you decide to try and get it running and not rebuild it you should at least check em out.