https://ozvolvo.org/discussion/2389/julians-240-t5/p1
Have a read of what I encountered using the ford bar, Super cheap for a much thicker bar, not as stiff as youd assume a 27mm to be, does require slight modification of the bushings... but again, its ultra cheap! ($23 from Centre road wreckers Imlachs)
Go with the EL bar if you can, newer cars with newer bars, use the stock shackles with modified bushings and youll be in for under $35 if you do it yourself
Probably best to go with the 23mm GT rear bar if you can get it, not as rare as people say it is