Thanks Bert, I thought for some reason DD had told me that the 4.11 setups were widely used in AU, I assumed the H150, that's what I get for assuming.

Any idea what the rear end set up is like in a 67 520 pickup ? In the diff swap section of the Wiki there's a link to swapping a rearend from a 411 (mid 60's sedan I guess)I have access to a pickup as well, not sure what that ratio is - haven't looked yet.

Thanks ,Evan