Gday To fit this carby it would cost about $400- that would include the carby + rebuild + adaptor plate + modifying linkages and tuned and jetted to your car, it will make a bit of difference as long as you fit a sports exhaust to match, it should rev quite well and put out some more HPs. I am sure a 4AC will not fit your gear box or engine mounts. Same with the 2TGs and 3TGs you can make them fit with mods but they do not bolt staight up. Good luck.