v2.80ED/23ºRR
2.78in² MIN
64-72cc chamber
1.365 x 2.360 opening
Fel Pro 1282
2.82in² AVG CSA
5.56 port length
255cc runner
2.150 intake
1.600 exhaust 
45º intake seats
radius 50º exhaust seats
4.155 fixture 
.200 145/109
.300 214/146
.400 267/193
.500 307/233
.600 330/249
.700 347/253
.800 354/255
.900 356/257
1.00 358/259

The Edelbrock Raised Runner Pro Port is one of the very few raised runner heads available.  This is a great casting and works well for those looking at RPM or nitrous.

v2.80ED/23ºRR BARE $2850.00
USA Edelbrock core.  Fully CNC'd.  Valve Jobbed, Decked, Guides Sized.