Hi Brent,
I have just ordered a set of Panasport wheels for my Alfetta, there was a bit of to and fro about the correct offset, I ended up with +7mm and I will have to run some spacers around 15-20mm. On my 75 I am running the 5 spoke wheels from the 156, all that needs doing to these is machining out the centre a bit, they rub slightly on full lock but not really an issue.
Sounds like the East coast challenge was a lot of fun, with a bit of luck I will get up there next year so we have some Victorian representation too! I want to see what those bumps are like coming into turn 1
