Only a suggestion but buy the Ford Falcon 6cyl performance handbook,it will eliminate alot of homework,and sifting/sorting information that you hear while 'bench racing' there are part numbers for NAPA,Ford so you dont have to hope that the sales person at the auto parts store just decided to punch in a number and say 'nope,dont have that part'.and of course lots of folks in this forum have alot of firsthand knowledge,and will always help out