I bought 4-1 headers off eBay, the are attached to just a straight pipe (can't remember what size, that was put on about 7-8 years ago...)
I'm fairly sure the dizzy is working fine, its definitely and electronic one as I was having problems with those condensers are you were saying, they were a nightmare. I've got it set to about 15deg on idle, so far thats where it seems to be happiest, haven't checked what it gets to when it revs.
Ill order an O2 sensor today, sounds like the best way to go and will fill up that dash just a little bit more
Thanks heaps