I bought an unfinished project '63 Falcon that came with a '75 302 4V that was freshly rebuilt and never run. I figure '75 302 is about as low a performer as Ford ever built (I can't even find a reliable HP rating, but I think it's less than 150). Since it was fresh I decided to install it and break it in before tinkering with upgrades. It has a new Edelbrock 500CFM carb and a set of long tube headers, and a Pertronix Ignitor inside the dizzy. My understanding is that the '75 heads are a major weakness. I'm not looking to drop a $1000 on a new set of heads. I have a set of heads from a '65 289 and another set from a '63 260. Either of these a worthy swap or should I look at something else? Any Cam suggestions? Roller or flat? Hyd or solid? Can I live with the dish-top pistons or should I change them out too? Any other advice/tips are truly appreciated.