Agree but even the V8s can be interchangable if you know what you are doing. Even though they are externally balanced, you can easily change the balance of a flex plate to match your engine. We do it all the time using SFI 401 flex plates of the other engines. It is a little harder with the Harmonic Balancer but even those can be balanced for other AMC V8 engines by adding or removing weight to a specified area. For the Neutral balanced engines, neutral balance is neutral balanced meaning there is zero weight offset to the balance of the rotating object. Nick Alfano Performance 4849-76 st. Kenosha, WI. 53142 262-308-1302 262-942-8271 after 6pm central and weekends Message: 10 Date: Thu, 01 Oct 2009 10:08:47 -0400 From: Frank Swygert <farna@xxxxxxx> To: amc-list@xxxxxxxxxxxx Subject: Re: [AMC-list] 727 vs. 999 converters ???? Message-ID: <4AC4B7EF.7020608@xxxxxxx> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Jim is referring specifically to the AMC V-8s, which have a different balance weight on the flexplate dependent on engine size (externally balanced). Doesn't apply to the sixes, which are internally balanced. So you're just fine!! _______________________________________________ AMC-list mailing list AMC-list@xxxxxxxxxxxx http://list.amc-list.com/listinfo.cgi/amc-list-amc-list.com