Seams like this subject comes up all the time. I bought one of those long block 440s in that sale too. It was a motor home block cast in 78. It had the steam holes just like the one in the picture and there was two per cly. or eight per side. I had a bud that had one he bought from a wrecking yard that had the same holes. We both tried using them for street cars in the eighties with 906 heads and they would not keep cool in the Texas summer heat. I gave up and replaced mine with the original 400 back in the truck and sold it. He reblocked his with a 71 block and cured his problems. He gave me that block last year and I gave it away. I still have the other but it’s got a set of motor home 452 heads on it right now with the matching steam holes. They use the small tapered seat spark plugs. Look on any new 440 head gasket and they have eight holes per side to match. I’ll have to look at my world hemi block to see if it’s got those holes.