G'day Scott, my name is also scott and I also own an FB ute!!!! I have just put the old grey motor back in after a new paintjob and new gaskets, but I still have a very loud "tappet" noise. The engine actually has twin carbies and extractors and has also been bored out 30 thou'. Apart from the front disc brakes and a different paint job the rest of the car is original.
I also have the original diff gear (3.89) and yes it does rev quite high at high speeds - I suggest a 3.55 gear. Do you have an email address?? Perhaps we could exchange photos of our cars...?My email:
scottdegenhardt@bigpond.com