Would someone check a parts book on the rotor issue here? I know about the composite pistons. Finding a caliper with composite pistons is very unlikely because of the failure rate. The pistons (or whole caliper) were replaced by AMC on warranty in most cases, by the owner when they started leaking in others. If a car had been driven much they would have been replaced within a couple years at most. I believe the rotors are all the same from 77-83 except for the 77-79 four cylinder models (2.0L), which used a solid rotor. Date: Fri, 14 Jan 2005 10:44:51 -0600 From: Guynn <amx69@xxxxxxxxxx> To: farna@xxxxxxx, mail@xxxxxxxxxxxx Subject: Re: More on Disk swap on 72 Gremlin Frank, And the 1977 Hornet/Gremli and some small 1978s were really bad to get parts for. They were also Pin type. The rotors are for that small year segment only. -- Frank Swygert Publisher, "American Independent Magazine" (AIM) For all AMC enthusiasts http://farna.home.att.net/AIM.html (free download available!)