[goatwgn]

While helping this good friend of mine with rebuilding the engine in his 1970 GTO, I ran across something I had never seen on a small journal block before. It has the outer holes for 4 bolt main caps drilled and tapped, but only has 2 bolt main caps. I have seen this dozens of times on the 3.25 inch main blocks (my own '73 455 engine in my '66 is like this), but I don't recall ever seeing it on a 3 inch journal block. The engine is a 1970 400, with number 48 heads on it. Block casting 979914. Running across a lot of interesting Pontiac stuff lately. A few weeks ago it was a '73 455 that had 4 bolt mains installed on it out of a Grandville, now this.