Russ, Here's what you'd get in CID's. 4.0L standard pistons are 3.875" in bore diameter. 290: 3.875 x 3.875 x 3.28 x 0.7854 x 8 = 309.46" 304: 3.875 x 3.875 x 3.44 x 0.7854 x 8 = 324.55" Sincerely, Greg Taylor :) <>< russ hathaway <russh97309@xxxxxxxxx> wrote: Andrew; read the thing about the 290 with 242 slugs. What year 242 works best, any mods needed to the 290 block and what size did it end up as......Russ ____________________________________________________________________________________ Never miss a thing. Make Yahoo your home page. http://www.yahoo.com/r/hs _______________________________________________ Amc-list mailing list Amc-list@xxxxxxxxxxxx http://splatter.wps.com/cgi-bin/mailman/listinfo/amc-list Sincerely, Greg Taylor :) <>< And the testimony is this, that God has given us eternal life, and this life is in His Son. He who has the Son has the life; he who does not have the Son of God does not have the life. - 1 John 5:11-12 --------------------------------- Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. -------------- next part -------------- An HTML attachment was scrubbed... URL: http://splatter.wps.com/pipermail/amc-list/attachments/20080217/c7692e03/attachment.htm _______________________________________________ Amc-list mailing list Amc-list@xxxxxxxxxxxx http://splatter.wps.com/cgi-bin/mailman/listinfo/amc-list