In case you're still looking, consider Marsh Performance Sidewinder heads. I got a set last winter. Took me YEARS to decide to pull the trigger and do what you are considering. Todd the machine shop owner is very good to work with and swapped out the springs to what I wanted at no charge. I did pay extra for him to bowl blend and clean up the castings. The fact that this was going to be done at his machine shop before being sent to me was the dealmaker. This combination is becoming hard to find, at least in Florida anyway. My very picky and knows his stuff engine man was impressed with the heads. He didn't need to re-do anything.

Wow, what a difference in performance from the plain ol' 3 angle valve job 452's that were on her before! I am very happy.

Take a look. Mighty pretty, huh?!