just converted my te cortinas front brakes with series 8 rx7 4 spots and discs, they are a 5 stud pattern that is the same as ford falcon..
cost of 4 spot calipers from jap wreckers $380 a pair
cost of caliper supports $120/ 60 per side
cost of new dba slotted discs $165 each
these are decent size discs at 300mm
hope this helps