First question
Did you use a Granada Scorpio floor pan or a fore Scorpio floor pan?
There are lots of differences between the two
And when you say floor pan, the rears are fairly simple but as for the fronts have you used the front strut tops as well?
This is where you will find problems, the Granada ones use a different top mount which won't quite fit the sierra shocks but i can't remember why not as I did mine about 7 years ago
The rest of the stuff, assuming you are using the Granada pan, all the sierra stuff will fit not a problem other than the strut tops
Don't worry about angles and stuff, the mounting points are the same