Would some of you GMC experts please look at my ad in "parts for sale" and hopefully identify these pistons. I noticed today that they have "60" stamped in the top which probably indicates that they are for a 248 bored .060 but I'm not sure. The picture is poor. The dome is 5/8" tall and covers approx. one half of the piston surface. I do not want to sell these to someone that they cannot use, like someone did to me.
Thanks for you help, Eddie

Eddie,

I agree they look like 248 +.060 pistons. However a better picture would help. Also measure the compression distance as that will help determine what stroke they are used for.

Ron