As long as you're talking about 199/232/258/4.0L engines the balancers should interchange. The only caveat I know of is that the 4.0L and 87-89 258 crank snout is ~0.33" shorter than an earlier crank. Either the earlier crank needs to be shortened or a spacer used to push the balancer back further. I'm using a 4.0L balancer on a 74 258 crank... or rather was. 10 years and 60K miles with no problems. --------------- Date: Sun, 2 Jan 2011 10:53:58 -0800 (PST) From: Joe Fulton<piper_pa20@xxxxxxxxxxx> I'm putting together a rebuilt long block 232 for my 76 Gremlin.??The long block is a factory rebuilt 1972 version.? ?I need to use the late 70s/early 80s version of the crankshaft balancer (thick balancer) instead of the skinny 60s/early 70s balancer because I'm using the 76 timing cover.? I'm using the 76 balancer in order to get the belt alignment where it needs to be (out in front of that electronic probe fixture on the time cover).? If you've put together many six cylinder motors you may know what I"m talking about. So my question:? As far as the function of the balancer, any six cylinder balancer will work right??? I know?an inline six cylinder engine is basically?balanced by it's very nature.? -- Frank Swygert Publisher, "American Motors Cars" Magazine (AMC) For all AMC enthusiasts http://www.amc-mag.com (free download available!) _______________________________________________ AMC-list mailing list AMC-list@xxxxxxxxxxxxxxxxx http://list.amc-list.com/listinfo.cgi/amc-list-amc-list.com