ok I just can't figure out what's best in cylinder heads cast or alum. I understand cast can produce more hp and with alum you can increase the c/r just a bit higher because they disapate heat better. If cast is more ideal why is the majority of the engines being built using alum heads? The only thing I have narrowed at this time is the manufacturer, I am looking at Edelbrock, Pro Topline and World products(Merlin). I am building a BBC, starting with a 454 block gen iv, not sure whether to go .030 or .060 overbore. Also in regards to head selection what size intake runners will work best(310, 325, 345)? Thanks for your opinions
Barry