Well, after an extended layoff, I'm able to slowly get back at getting this old truck running. Lifr and other projects seem to keep getting in the way.
With the nice refinished head awaiting install, I got to spend alittle time cleaning up the top of the block and a few piston tops. Since #2 was at TDC I started cleaning it off 1st. I was surprised at the relatively small amount of carbon buildup.
My old Kohlers accumilate alot more in much shorter time.
A wirewheel knocked the ancient deposits off and put a shine back on the top. With the top cleaned I noticed a couple stampings on the piston top, An "S" was etched on the waterpump side and a #2 on the flywheel side. I spun the engine and brought piston #1 to TDC and cleaned it up. It also had an "S" on the front but a #1 on the rear. Am I right to assume that these are std OEM pistons and more than likely the originals?
Does "S" = stock size?
There is a slight ridge at the tops of the cylinders and I've decided on finding/renting a ridge cutter to clean it up and then pull the pistons/rods and do alittle measureing, then go from there.

Dave