[gtohurstjudge]

Originally Posted by Greg Reid

You may have already done this, I can't remember if you posted it or not. If you have, excuse me for repeating....but
Check the date code on the block. It's right near the distributor hole. There are quite a few codes that were used on multiple years. The only way to tell them apart is the combine the two letter code AND the date.
If it's a '70, it will probably have a large casting '70' back there. The earlier years just have something in the format of 'A157' and is smaller and therefore a bit tougher to see. You'll need a good light and a flexible back.
In the example given, 'A' would be January, 'B' would be February and so on. '15' would be the day of the month and '7' would be the last digit of the year, ie, 1967.

If it's a 67 motor, you may have one of the engines
with a bad crankshaft that some poor schmuck installed timing gears on and now no power.