Josh, if you are fitting rear discs be careful with how you weld your rear uprights together, if you do them as per the book you will not get them to fit. The drilled plates need to be at an angle so that the brake pipes and handbrake cable don't foul anything. Have a look at my website -
www.deepfolly.co.uk - to see what I mean. I was lucky enough to read on here about someone who had encountered the problem before I did mine.
Enoch