Hi all I have found this web site it is for doing gear speed.
http://www.sjdsm.com/tech/gear_speed.htm
nice simple little site ..... according to it my torana would do about 218kph in top gear at 4500rpm ...
at 4500rpm in top gear my VZ S Ute will do 260kph ...... be interesting to see what revs you could get out of the alloytec in top gear, its supposed to rev to about 6000rpm .... i reckon it would struggle to do much more than 4500-5000rpm in top gear though.
Sammy.
http://www.oldholdens.com/