If you have a Yella Terra snout fitted to your car there are a whole range of pulleys available. The Yella Terra snout is designed so the pulleys can be swapped with ease. The pulleys are available in a range of sizes 74,71,67,64,61 & 58  mm, the std pulley on a 5.0 lt Falcon is 74 mm. 0008332/0008632