Well some of this has to do with the lift that you will be running. On the intake you can change the valve job from the 30 degree seat to a 38 degree if the lift is to be under .500 and if over you can go to a 45 degree. Use a 60 degree bottom cut into a 78 degree bowl cut with a 30 degree top cut. You can lay the short side back and round it of the help the flow at .400 and up. Back cut the valves also with a 30 degree cut.
On the exhaust just stick with the 45 degree valve job with a radius bottom cut inot a 78 cut into the bowl with a 35 degre top cut. Unshroud the exhaust some by cutting the side of the chamber with your top cutter out to about 1.900. The exhaust hates sharp edges so smooth the top angle into the chamber. You can smooth the runners and round the short side as well. You should be able to get about 200 cfms on the exhaust and 270 cfms on the intake. Good luck, Keith Craft
