Final Engine Compression Ratio?

OK, wyrm.... yeah moving can be dangerous to your ability to find your treasure trove of stuff! I thought I had fond +10 cc net on those pistons but wanted to see if there was some confirmation of that.

BTW, OP, is the engine out of the car and on the stand? Doing the displacement test is not all that hard on the stand if you can rotate the engine 45* to get one bank of cylinder vertical. You don't need the plaxiglass then but you do need a graduated burrette. And.... you need a dial indicator to be able set the piston down in the hole a precise amount.... many folks forget that. If you are off .030" in how deep you move the piston down, then you are off 5 cc's right there. So it needs to be done with great care or it will give worse results.

Edit to add: And if you don't have a graduated burrette, but have a gram scale, then you can use that. 1 cc of water weighs exactly 1 gram.... so you can use the gram scale to figure out how much water is added to the hole. Use 1-2 drops of dishwasher detergent in the water to break the surface tension around the cylinder wall. Level the block deck with a bubble level, set the piston down a precise amount from TDC using a dial indicator, pack a bit of grease around the top edge of the piston and wipe out the excess, then fill where it is visually perfectly level with the deck; visually sighting across the deck with a light behind it works pretty well. Weigh water before and after fill, and the number of grams added is the number of cc's. The number of cc's that the piston has been displaced downward can be computed from the precise distance it has been dropped from TDC, and the final number worked out.

Hmmm the catalog volume and some estimate of the amount milled off would be a lot easier LOL.