the rear bar is a pretty simple fit also , i bought a 2nd hand item to hack at first ....
there are 2 ways it can be done either trim a v out of the top of the bar in either corner and glass it together , or cut it down the centre and remove about 5 cm if that off the width ..
I'm yet to finish it , to be honest i havent really started as iv got 2 other cars i need to finish off first ..
as for rivalry :) I'm up for it .. i dare say my ke will rival most in mechanical department ... I'm going to run ful s13 silvia front suspension .. and 5 stud conversion all round , iv looked into it and its totally doable
ill do full write ups when I'm doing it / done so those who would like to can copy