Thanks drew. Yep, looking at the diagram they are similar. I have previously replaced these with standard bushes, which are a little tricky. But by far the easiest is the poly bushes, but these impact the ride, although to what degree on a six i am unsure.
oh, 1 thing. my mileage is 115,000 not 155. (typo). The judder i was experiencing has now completly dissapeared. even a spirited drive see's no brake fade, or wheel wobble. I think the brakes were somewhat corroded from short drives, infrequent use next to the sea. I still have suspect rear top mounts for which i will look into, but the brakes seem to have bedded back in. I will naturally be giving these a full inspection at some point.
The exhaust is getting patched up next weekend and the rear gearbox oil seal sorted over at my friends garage as my ramps have a tr3a stuck on them at the moment.
Spax psx kit has been sourced as the cheapest overall option, with a little extra paid for matching springs, and adjustablility (i.e. i could have had a ventura spring, and bilstein shocks marginally cheaper).
I intend to do some track days so the little extra for the adjustable side, was worth it.