Do NOT use those gaskets on any block that the bore will be bigger than 4.320 They where designed to be used on the 38 and 426 W blocks, not the 400 and 440 blocks Look at the standard Fel Pro # 8519 or a better race gasket from Cometic, SCE or one of the other race gasket companies that offer the bigger bore sizes
When Mopar started using the 440 blocks in 1973 in the trucks and motorhome chassis they change head casting and blocks with those holes to allow water to circulate around the exhaust ports and valves for better cooling The early 1009 gaskets didn't come with them either so you have a late set