I almost forgot to mention:
The spigot bush in the flywheel needs reaming or boring to fit the Ford input shaft (I actually just drilled mine). I forget the size as I post this but it is I think 16mm. Check first. Some conversions use a special bush about 3mm longer. I found the original one fine. Fit with Loctite, the flywheel stops it dropping out. You may find it was loose when you took it out.
Now here is an update. I am reliably informed that 1.6 Sierra’s also had a 7.5”dia clutch which will also fit. It’s not what Borg & Beck say,(they say it has 20 splines) but one of “our correspondents” has actually done it and says that B&B’s info is wrong and that it does have 23 splines. You may care to check it out first.