Thanks guys, finally some success, there didn't really seem to be fuel coming out of the reg so I just changed the whole fuel rail set-up with injectors. I also swapped the tb while i was there.
It seems to be running good now (I put it down to a stuck open injector). I however did notice that with both of my engines, they seemed to have a slight miss when you hold the throttle constantly slightly open. I would describe it as a beat or pulse. Sometimes it will do it a few times in a row then it might not do it for a few seconds and you get the idea. I could never really be bothered addressing it in the old engine, but is this a normal thing for these engines? If not it would probably mean i have a dodgy coil pack as this is pretty much only the same thing i used in the two engines along with the alternator. In that case it would be an easy fix.
Now I have to find where this bloody coolant is leaking from, its coming off the bottom of the sump and I hope its not a Welch plug.