looking for a set of slant 6 to 360 motor mounts with the poly bushings ? yes I know I can run the factory original 273 mounts and use a space on one of the bolts but where I live rubber dry rots here in southern mo. I'm still using the slant6 k frame and not swapping out . has anybody made sold metal mounts for these earlier abodys ? I know they make them for 67 and up.