Converted my 200b struts to take Commodore strut tubes. More pictures soon!

Thats one way of many systems used.
I have been using that system on my coupe for 10 years and on other cars i have built. Resonable price as well.

...having no end of grief trying to upload resized iPhone images....

Email me the pics I'll post them.
Cncplastering@hotmail.com

Thanks Nick, pictures sent. Commodore tubes were cut out, the stubs were bored out in the mill and lathe. I TIG welded them in the lathe to make sure they were aligned (I made sure not to earth through the lathe bearings).

The stubs were hard to machine around the old weld effected area.

The conversion allows the use of 36mm Bilstein Commodore inserts as opposed to 30mm inserts from vehicles like early VW Golf etc.

The bigger piston shocks don't overheat as easily as smaller piston shocks during a rally stage. Shocks are best if revalved such as those that Stuart Wilkins sells.

Here's your pictures. But of work in them

I've always wondered why nobody does the shocks like that --less problems

I do, but I use base height adjustable stuff. Can get valves and spring rate changed to suit application too

Base height is definitely the go if you can get inserts to suit your application. I nearly adapted some S13 base height adjustable coilovers for better preload and corner weighing setup, but the majority of shock inserts would blow during a long rally stage. 36mm Bilstein inserts will do quite a few rallies between rebuilds. With a passenger of similar weight corner weights a less of an issue, and preload should be 'OK' if springs are at least captive.