honestly when you have it ported, buy whichever head the guy porting stocks. tell him what octane fuel you want to run, and let him do that work. Most of them are smart enough or do custom machined domes.
Received two rear brake lines, one for stock length swinger and a +2 today from Raymond Chan at Apex Brakes. These are great looking and well put together brake lines. Do not hesitate to order from Apex Brakes Sent from my LG-H873 using Tapatalk