Thanks for all the info guys, got to the bottom of the troubles firstly, before I pulled it apart I made sure everything was running nice tuned ect, so that way I knew my dizzy plugs leads fuel system carb ect worked properly, The problem was a group of things firstly to get it running above 300rpm halftanked was right the condenser had stuffed out, also because I was trying to get it going yes I had retartded it heaps to the point that the timing light couldnt even pick up the balancer mark it was no where to be seen once I got it going again. Got her running now and wow let me say that again wow, would not have believed the differnce a hot cam,roller rockers and high comp heads would do, im still running stock exhaust manifolds and this is now a sweet sweet ride, still got to tune it properly though. I also now have one additional problem so if you can help out guys I would appreciate it, this old girl runs on pure lpg no petrol at all, after about 5 mins of running the lpg vaporiser iced up not o sure why, also does anyone know whether you advance or retard the timing for lpg.
Once again thanks for all the advice guys
Steve