For guys like you I first ask them what size cam they plan on running. If it’s a 484 purple shaft possibly get them checked out at go have fun. If you are going to run a .520 Racer Brown solid lifter cam then it’s your call. But I would recommend using the stock 2.02 valve and maybe a nice valve job and set your spring pressure. If you would rather have 290cfm instead of 250’s and are going to use the power then again it’s your choice. My customers if they want power usually spend the 100.00-200.00 more for a 2.055 valve. They usually ende up flowing 308-315cfm. For my customers they get a 5 angle valve job. With the stock 2.02 valve the throat size is already in the edge of being to big on the Speedmaster heads so the get a hand cut 70 and proper sizing of the 60-45-30 and a slight 15. A lot of shops will charge 350.00 for a valve job. It’s included in my porting charge. I should wise up and change that.
