[chiphead]

I bought a RPM used, so I don't know if it was milled before I got it. I don't think so, since it was not port matched or anything. I ran it on a 350 with 17 heads that had a mild cleanup and stock d-port intake gaskets. No issues with bolt holes that i remember.
I also ran it on a 670/ '67 400 block combo. Deck was at 10.225," no issues that I remember. The worst part was getting it lined up with those orange gasket locators, those want to slide this way and that.

For this 434 stroker build, I had the same 400 block decked to 10.215" and the heads surfaced again, the bolts didn't want to line up. I had .060" milled off the intake, but I had to trim the lower edges of the ports and massage the valley pan to make it fit. I separated the water crossover and it did NOT want to fit after it was milled. I had to go with a KRE crossover and slot the holes to get it to fit and seal on a 1233 gasket.