Keeping this on-topic, it's in a '63 Falcon. Got a set of Ford GT40 heads (F3ZE-AA) that I want to put on a 1975 302 (stock hydraulic flat tappet). Is this a bolt-on job or do I need to change anything else (rockers, springs, pushrods) in the valve train? What do you guys think about roller conversions versus staying with flat tappets? I appreciate rollers have advantages but I like to keep the budget lean. I'm thinking of going with Edelbrock Performer intake and cam. Any comments or suggestions with this combo?