hi yes there is the external return and i'm pretty sure other internal changes as well. I'd try and fit the entire loom as is and would not go down the path of making your own I think you would be opening yourself up to a soul destroying list of problems.
how many entered this time mitch, anyone new? Who was your biggest competetion and most importantly how did the car perform, much different with the extra horsspower?
Was awesome weekend and we'll be going back next year and are looking at doing the Bathurt one too. Next year we are going to make 2 teams of 4 instead of 1 team of 6 so if you or anyone is interesed keep an eye on the forums as I'll be calling for volenteers :)
Couple of vids on my site, they didnt turn out very well, the camera was mounted to high to see much of the road but you get a good view of dash and driver
http://youtu.be/JreUKhTJ5Oc
Well we went racing and it was a full on weekend. The old 82 was very challenging to drive being setup for dirt and it was hard work pedalling it round the track.