Hi SAU members.
As promised, my son and I now post the pictures and instructions for the DIY induction box, which is now finished, installed, and working like a treat.
The best thing about this exercise, was that the whole deal cost just $40. (with a few bits lying around too)

The car had an HKS Superflow pod filter, which we were trying to make legal.

The steps we took were as follows:

1. Buy a pices of 2mm thick cardboard from the paper shop.......around 400mm x 600mm - $2.00
2. Cut to the approximate shape to house the filter (car specific fit) using the existing GTT mounting points and trial fit until you get the approximate correct fit. The dimensioned template we made is shown in the attached pictures.
3. Buy a 900mm x 250mm x 2mm think peice of scrap aluminium polished sheet - $20
4. Mark out your template on half of the aluminum sheet and cut out with a jigsaw
5. Mark out the approximate fold lines on the aluminium
6. Fold by hand across the fold lines in the directions with a gentle constant pressure across a rolled flat edge
7. Drill 5mm dia holes in each of the end lugs
8. Trial fit a million times to get it right, and keep filing, cutting and massaging until you get the thing to fit perfectly.
9. Cut out two 80mm x 30mm peices, and round edges to for the top fixing mounts, bend at 90 degrees, after drilling two x 5mm holes in each lug side (see photos)
10. Fit top fixing mounts to side as shown using 2 x 5mm x 25mm high tensile steel hex bolts, washers and nuts.
11. Install your new heatshield using the existing mounting bolt and one new 25mm x 5mm dia high tensile steel bolt (see pictures) - $6
12. Cut shape of top out of same cardboard and trial fit so that it does not touch any of the chassis edges of the engine bay.
13. Cut out the top out of the other half of the aluminum using your template.
14. Mark out exact drilling points through top, to match fixing points and position in engine bay.
15. Trial fit another million times until its just right.
16. Remove all, and hang by lugs in a fairly dust free sterile environment (sure, we used the garage)
17. Spray Knights grey primer on all areas (touch dry in 15 minutes) - $7
18. Spray Knights engine enamal (gloss black etc) covering all areas till desired effect is achieved. - $7
19. Leave for at least one hour
20. Fit and glue on a rubber / foam edging across the bottom.
21. Fit all as shown, and dress with whatever vinyls you want (Mines in this case)

The project took a full day.
The installation is solid, with no vibrations or noise, and I think its now made that pod filter legal.
(At least we hope so)

Anyone wanting any help, or any additional information, just email me.
Regards
TR34GT (Jim)