Aluminum cylinder heads

You can and should do that but set some limits, no need to go overboard. There are many members that over thought, over built, and ended up disappointed with the drivability and mileage. I am talking about a radical combination that only works with your foot to the floor and tires screaming and impossible to run 70 down the interstate to a out if town car cruise while getting 5 mpg with $5 gas.
That makes sense to me