Are these roller block motors?
I believe they are. Have you opened it up yet? If it's a roller block it will have 3 bolt holes in the valley above the cam on centerline.
Some guy has one for sale on the cheap. I asked him the same question and he didnt know what a roller block engine was It runs good with 100,000 on it. A good candidate for rebuild, if in fact its a roller block motor Stan
The block may have the spider bolt bosses but there's no way to know for sure if it's got a roller cam without looking in the lifter valley. Some applications had roller cams while others did not and all used the same block.