Ron's 245RP 48 degree INDY heads...I had them put the small exhaust port in these heads as well to help with header fitment.

Basically they just leave extra material on intake face, they just surface intake face of casting just enough to get a sealing surface above the port, you can see raw casting left above port in several of following pics....

Taking some measurements it's aproximately .160" extra, & then they machine pushrod holes at different angle/depth than the 59 head.....