I'm about to do a gt40p head swap what all can I reuse on the swap and what do I need new valve train wise. Can I use the stock ho motor lifters and pushrods? What rockers can I use the gt40p explorer rockers or can I use the rockers off my e7 heads? Last question is what will I need for valve springs? Will be running either stock cam or maybe a smaller ford letter cam like b or e cam. (Yes I know there are better cams out there)