That was the first thing I looked for on these blocks.The 2 later alu blocks had exactly those holes in the pan rail.BUT those blocks had the pan rail machined when I got them.Dimitrie did not have any knowledge of the early blocks as many were cast in the late 50s.They might have had a outside foundry cast them also.The later ones were cast I think about 1972.No clue on these 2 blocks.Im taking them to my machinist this week to have him take a look at them.Monetarily wise it makes no sense to do anything with these castings as they will never be as good as the aftermarket alu blocks avail.I have never been accused of having good sense.Tom
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