Ok I just found this ...

STAGE V CUSTOM HEADS
Price: $2,350.00

Quantity:

Brief DescriptionDetailed DescriptionSpecifications#S-426
(CLICK ON IMAGE) If you are building a high output motor based on an original or aftermarket 426 HEMI type block, these heads are for you. They have larger than stock intake ports and are capable of supporting as much power as you can build around them. In fact these heads hold the speed record at Bonneville for a wheel driven vehicle at 433 mph. Optional raised exhaust ports offer exceptional gains in breathing. Intake valve can 2.250 to 2.400 and exhaust can be from 1.900 to 2.000. Cumbustion chamber 168


It seems they have 3 different castings, the replacement, the custom -these, and the millenium. Im pretty sure the custom is what I have. ....My question is would the Custom head come with different seats depending on intended valve size or is it the same seat for 2.25 to 2.40 ? ? ? Thank you very much for your time guys