When I had a 350 & manual linkage I ran Hedmen. First set was the cheeper ones and after a while they warped and even with two gaskets I could not get them to not leak.
The pic above is Hedmen Elite series = MUCH better, way thick flanges to prevent warping. In the pic above look closly at the frame bracket the Z-bar mounts too. I had to drill a hole just to the right of the factory location to move the Z-bar towards the firewal just a bit. This did not affect the Z-bar's function and my manual linkage worked fine.
I would go with Hedmen Elites, the collectors clear and they tuck up nice and high away from trail obsiticales.
I have a 454 now and run Thorley's with Hydrolic clutch so no linkage to worry about.
