I emailed Kieth Black piston company about making and stocking hypereutectic cast pistons for the jeep 4.0 using an amc 258 crank and 4.0 rods. They have sent the ideal to there engineering dept for further evaluation, because of several other inquiries about stroker pistons. If anybody is interested in seeing these pistons make it to the shelf, the Yahoo stroker group for the jeep 4.0 has a poll going on who would buy these pistons. After a few weeks the results will be sent to KB. Or you could call or email KB and let them know you are interested. BY the way...if you are not familiar with the 4.0 stroker there is some good info on the net. The yahoo stroker 4.0 jeep group is http://autos.groups.yahoo.com/group/strokers/
the vote page: http://groups.yahoo.com/group/stroke...eys?id=2579541