Piston Question

That's the spirit! Did you check the weights being matched? They probably are, but it's easy to be sure.

You might want to look into finding a set of higher CR ones if you are looking for a whoel set. Like:

1. Sealed Power 526 AP; looks like they are 1.745" compression height and have no valve reliefs. A quick computation shows that raising your SCR from the low 7's to the low 8s.... a VERY worthwhile improvement. They are press fit pins, but I'd put them in the engine in a heartbeat over the lower CR ones that you have. Here are some STD bore ones for sale.

http://www.ebay.com/itm/SEALED-POWE...ash=item2331d72db7:g:uPkAAOxygj5SemBr&vxp=mtr

2. Silvolite HC814P or CP Hypereutetics (check the weight versus stock cat to see if they are close or you will have to rebalance the crank. These will make the same rise in SCR as above.

3. Also here are some old TRW 318 pistons: I don't know the specs, but generally the LxxxxF TRW pistons were forged, not cast as this ads says. But they are .030" over.
http://www.ebay.com/itm/TRW-cast-pi...ash=item23587471c4:g:yMMAAOSw9r1V7iGQ&vxp=mtr

And here a link on some pistons data:
http://www.moparchat.com/forums/showthread.php?t=106712

And a lot more:
http://www.campbellenterprises.com/pistons/318-pistons-mopar-dodge-318-stroker-pistons.php