I have many of the upgrades you mentioned. I guess I also searched for deals. For instance the Aviad
oil pan I found used for 1/2 price. I also am running a Jag rear which I paid $275 for. The alum diff is really nice but not any stronger than the jag unit. I also went with the Genesis iron block the alum was only $400 more though. The Shelby block is overpriced. As far as heads go Barry from survival said the stage one give you 550HP with a 482. Why would you want more? The powerband moves up in rpm's and you then have a track only car. I wanted my rpm lower. I figured the engine master winner Survival motorsports was a good one for advice. So in the end you can always spend more but you don't always get more.