You can normally pick up Haynes manuals from eBay, though be careful to pick one up that goes to 1986 or includes the 1128. Most of the manuals on there are early ones. (Lots of MR61 factory manuals on there just now - fantastic for anyone with an earlier car).
We don't tend to answer posts where the manual would cover the answer, but since you are special - torque sequence the middle two bolts first, then work outwards. Manual suggests 44lbft.
Are you filling the system from the radiator rather than from the expansion bottle and then bleeding (that would be the right way). Lot of people seem to do it different ways which leads to overheating.