Aluminum cylinder heads

We want to go with a set of aluminum heads on our 72 Swinger w/383 and auto trans. Right now with the iron heads and Schumacher headers, the plugs are a pain to change and the plug wires are very close to the headers. We're looking at Edelbrock E-Street 75cc angle plug heads. Is anyone else using this combination? What are the pros/cons?
Thanks
the trick flow 240's are way better, i have them on mine out performed the eddie's by 30hp