Still working/planning this out.
Wayne - the wheels you have are the "classic" - they have a chunkier spoke and require the rim to be fitted much further out.
I know people do run these wheels - Sam Crupi has them on his wagon and that is dropped quite a bit.
I took a peek under his guards and he has the lips rolled - just the lips.
I must ask him what diff housing he is running - I will have trouble understanding how he did it if it is FB/EK.
The wheels I have are the "revised" version - it has narrower spokes. The rims are exactly the same - but they are set further back towards the centre of the car.
I chose the 14" x 7" with a 3.5" distance from the brake drum mounting face - because all those numbers went into each other perfectly.
The 3.5" is the least that can be assembled - the 14's I wanted because of the taller tyre rolling diameter and the 7's to get the tyre to "spread" across the wheel and reduce as much tyrewall bulge as possible.
I have 205/70's Goodyear GT-3's on these wheels - there is a very "kind" taper from the upper wall of the tyre to the tread.
Pic -
I worked very hard with Ray Dunn out at Dragway in Kinglake West (actually Pheasants Creek) - who did the machining of the alloy centre and fitted the rims to them.
He gave me as much as he could - machined down the alloy to the point that he would not permit any further reduction - and fitted them into the rims at the very extreme where the edge of the spoke was at the very start of the rim curve.... you simply can't get Dragways to sit any further in from under the outer lip of he guard.
Even with all these arrangements done - and the suspension wound up tight (without air shockers - which I do not like) - they scrub ever so slightly on big dips in the road at higher speeds - this is with Koni adjustable shock absorbers wound up to within one turn of maximum flow - I won't go any further than this for it does nothing more to restrict the upwards stroke - just makes the downward stroke slower.
Now, the next bit - rolling the guards..
It's not as simple as first believed. I took a long look at the lips of the guards again yesterday. Yes, you can roll up the very lip - but there is a double skin - and it is set back quite a distance from the outline of the body. This second skin is the luggage compartment wall in the cavity forward of the bootlid frame... from the side of the rear seat.
Rolling the lips might give nearly 1/2" clearance - but only a benefit of 1" lift until the tyre reaches this second skin - so, if you believe you are going to be able to drop the body to the floor with Dragways on - I'd be very interested to learn how this is accomplished without seriously breaking into both the arches and that second skin...
pix-
When we come to the front - it's not the outer rim which is the issue - but the inner.
Again, same wheels - 14 x 7 with the rim as far out as possible - the 7" rim "just" clears both the tie rod and the upper ball joint.
I ended up fitting 2 LU-1 spacers to the hubs - that gave me the added 3.5 mm of clearance from both..
The following pix were taken without the spacers - the rim "just" rubbed on the body flange of the upper ball joint with the suspension fully relaxed... as in the first pic. Second pic is with the suspension at mid point.
Spacers took care of all of the front clearance issues with 7" wide rims.
Pix -
Finny, we will finally meet up at HB - been looking forward to this for some time.
As for finding a competent person to roll the arches - I'd want some guarantee that they have done one of these old buses previously with successful results before engaging them to perform the work.... there is an awful lot of strength in there if the metal is sound - unlike most modern vehicles where you could probably achieve this with just a pair of Stilson's....
Wayne, on a closing note - to me, these Dragways (especially the ones you have fitted) "are" the sports wheels for these old cars... I'm not in love with modern wheels - and totally "over" the "Indy" wheels - they were all the rage back in the '70's.
If you take a peek at the edge of the outer rim - it sits very well under the arches - the distance from the mounting face of the brake drum is more than 1" inwards of our wheels... they became very popular very quickly, and I did not ever think that they belonged on old Holdens.... my opinion, you understand...
frats,
Rosco
) Dragwway Indy's for my Torana. We spent an hour measuring the rear backspacing to get a 7" rim on with 235/60 tyres so as not to scrub. I then did similar for my GTR Torana but with a steelie and the end result was the biggest tyre without rolling the guard and without scrubbing and it looked really good. For a torana.... Sadly though rim choice and offset/backspacing seems to be limited. 
