First, welcome to CHR. You're in Southern Australia, and like Tech says it's not likely that you're going to get much detailed help here unless one of our members from the extreme deep south jumps in here. SharpMark over in NZ seems to have a good handle on some of the swaps, for one. The models you mention (Holden's, Falcon's in the '80's & '90's) are not offered up here, and we don't see them imported as previously owned vehicles so you'll be educating us as you go!