For some reason I didn't have much success with the speedo calculators, but  I think there's a 5% difference between each cog so if you know which one you have you can easily calculate what you need, or at least which is closest?

Best to look at what colour/teeth you have now and start  your calculations from there.

If you can pick up from Torquay Vic I have spare rear window and chrome, will swap for VB 
sgomachen at hotmail dot com
Cheers George.

sold.

Complete HR front end.     Condition, as pulled out of car.
Ball Joint stub axles with original drum brakes.
Easy conversion to big discs if you use HQ-HX stubs.
$400. Pick up Torquay Vic only.
Please email for pics,   sgomachen at hotmail dot com

There is a good write up on this conversion on the Torana Forum, but you will need to be a member to see the photos.
Although on a Torana column, the details would be applicable to most Holden columns.

[$125]

Trim, used, straight, fair condition with minor scratches and dents.
Ok for street car but should be properly buffed, polished etc.
$125 the lot
Pick up Torquay Vic.
Requst photos at sgomachen(at)hotmail(dot)com

Missing strips along door tops, so included is:

-pair front gaurd spears
-pair short straight section mid rear door
-pair vertical rear door flash inc some mounting brackets
-pair rear quarter strip

[all parts $20 each.]

all parts used and straight condition, all parts pick up Torquay Vic or post at cost if required,
all parts $20 each.
to request photo, email sgomachen(at)hotmail(dot)com

-interior mirror
-interior roof light with two covers
-pair metal weather shields from above vent window
-pair bonnet springs
-left front bumper corner
-right rear bumper corner
-left front indicator housin
-cigar lighter and ash-tray insert

Rear end complete flange to flange.
Told it was 3.08
Mounting set up for FJ, same as FC ?
Pick up Gisborne Vic.  $200.
email for pics or contact;
sgomachen at hotmail dot com

Complete HR front end, disc to disc, but mounting is set up for FJ subframe. Will need to be altered to suit FC.
Also HQ stub axles, discs, calipers bolt in for big brake conversion.
Also VB VC steering rack ready to shorten for steering upgrade.
Everything there required for this conversion.
Pick up Gisborne Vic. $900.
Email for pics or contact:
sgomachen at hotmail dot com

As suggested elsewhere in here, tape a flat stick to the end of the spring clip to get it in position, then tap the stick to drive it home.

Ken, thanks for the info.

gee Graeme I should just check with you first for any bits that I'm looking for!
I'll send you a pm.
cheers, George.

Does the peddle box / bracket bolt on, or is it welded to the firewall ?
I can't remember and car isn't here to look at😒
Am looking for one if available.
Cheers George.

With a rear mounted rack, what steering arms are you guys using, and do you space then off the stub-axles a bit?

Thanks for the offer Graeme; I feel guilty as I've already got a few bits from you
We'll see if anyone needs them first.
cheers, George.

Vintage rear helper springs.
Also pair of 5 leaf rear springs.
A fortnight dipped in molasses will remove all rust!
$100 or will swap for pair of bottom u bolt bracket / shocker mounts.
Pick up Torquay only.
sgomachen (at) hotmail (dot) com

Excellent condition, no missing pins, two clips attached.
Needs good clean or re-chrome.
$45 includes postage.
sgomachen (at) hotmail (dot) com

With my v6 the floor front and back got very hot, this is where I had the muffler.
Put in a piece of flat gal sheet as a heat shield between floor and exhaust and that solved the problem.
Suspended on brackets with an air gap between  both floor and exhaust.

Spot on.
Just had fresh paint, which was a bit darker than the colour on it, which had been resprayed anyway.
I prefer the current shade, a PPG mix.