red87

i have a set of gt40p heads and was wondering how much of a cfm gain would be achieved if i had the valve seats ground for three angles? i have ported them according to the diyporting website and will be using ferrea f6000 racing valves. thank you
also how much should i pay to have the seats ground for the three angles?

mjr46

3 angle valve job is pretty much standard, a good one will yield better flow capabilities but a 5 angle would be competition material as far as cost??? depends on who does it and their ability and reputation

woodsy

Good valve job on a serdi is 250.00, your pouring a bunch of money into a stock iron head, think ahead.

Portmaster

Make sure the guides are up to the task. I charge 220.00 for this service. When you are all done you will have 700 dollars (valves, guides, seats, springs,labor) and hours of your own work tied up in a pair of boat anchors. Lap the old valves in and run them until you can buy a set of good heads.

Slo5oh

Might as well get an afr head for the price you will spend.

1995mustang818

depends wat you want the car for if you street race and want a hustle car then dump some money into iron head shave all the head marking off...my gt-40s are ganna get ported by thumper hes ganna take all the casting numbers off im ganna go with an xe274hr i think im ganna tell people all i got is a cam intake and full exhaust