I just remembered that Matt Kievit here in Michigan adapted Ford 2300cc Pinto pistons into his 258, with a 258 head for a serious compression ratio. He was running around 0.035” squish between piston and head. It was a really sweet motor. He had the ford pistons machined out to accept AMC wrist pins. The 199 flat tops or 290 flat top pistons would be good. Sincerely, Greg Taylor :) <>< Rochester Hills, MI 1989 Jeep Grand Wagoneer "TRMN8R2" 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 --- On Thu, 10/2/08, Wrambler242@xxxxxxxxxxx <Wrambler242@xxxxxxxxxxx> wrote: From: Wrambler242@xxxxxxxxxxx <Wrambler242@xxxxxxxxxxx> Subject: Re: [Amc-list] LPG 258 To: hh7x@xxxxxxxxxxxxx, "AMC/Rambler owners, drivers and fans." <amc-list@xxxxxxxxxxxx> Date: Thursday, October 2, 2008, 8:52 PM A lot less milling if you slip a set of flat top 199 pistons in there first! I think we spec'd out about 10.5-1 with the 199 flattops and a 4.0L head in basically stock heights. I believe you can use a chevy 250 six piston in a 4.0L block to get around the 11 or 12-1 range too. Again, not positive of the exact needs to accomplish this. But heard it is doable. -- Mark Price Morgantown, WV 1969 AMC Rambler, 4.0L, EFI, T-5 2004 Grand Cherokee Laredo, 4.7L, Quadratrac II " I realize that death is inevitable. I just don't want to be around when it happens! " -------------- Original message ---------------------- From: Brien Tourville <hh7x@xxxxxxxxxxxxx> > > LPG runs best with high compression - so - > a 4.0 7120 head to a stock '81 258 > would require roughly how much shaving > to accomplish 11 to 1 compression ? > > > T > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > http://splatter.wps.com/pipermail/amc-list/attachments/20081002/599d6eb9/attachm > ent.htm > _______________________________________________ > Amc-list mailing list > Amc-list@xxxxxxxxxxxx > http://splatter.wps.com/cgi-bin/mailman/listinfo/amc-list _______________________________________________ Amc-list mailing list Amc-list@xxxxxxxxxxxx http://splatter.wps.com/cgi-bin/mailman/listinfo/amc-list -------------- next part -------------- An HTML attachment was scrubbed... URL: http://splatter.wps.com/pipermail/amc-list/attachments/20081003/e26357a1/attachment.htm _______________________________________________ Amc-list mailing list Amc-list@xxxxxxxxxxxx http://splatter.wps.com/cgi-bin/mailman/listinfo/amc-list