Hey krankieone
Thats a nice '66 you have there.
Try Rob at Herrod Motor Sport. Or Geroge at Mustang's Down Under would be another shot. Albury Performance have lots of good motors, heads etc. Other than that, you may have to go to Queensland and try SuperPlus. They do a lot of the US stuff. I'm not sure if Yella-Terra do the GT40's ??? Don't count out the F-Series suppliers. You would be suprised how much stuff of a F-100/250 fits on your Mustang !
If you want to save some money, I'd check
"Parts Peddler Magazine" first and see what you can find. Its the best $2.95 I ever spent

Also the Melbourne Trading Post.......
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1995 Mustang GT - Vert
RHD Conversion, Vortech V2-SQ, 42# injectors, CAPA Chip, 18" BonSpeed Wheels, 3.73 Motive Gears, AutoMeter Gauge Pod, Pedders Springs, Koni Shocks, 13" Cobra Brakes, BBK Shorty Headers
~~ He Who Dies With The Most Toys Wins. But Is Nonetheless Dead ! ~~