I had 145lb on my mk2, single leaf, bought from Peter Lloyd rallying, can't remember the front rate, sorry.
These were used with spax dampers all round, was great, but of course tail happy in true mk2 fashion!!
It was defo comfy though, did many many miles in it, was a 1760 auto, with 1300 torque converter, fast and good mpg.
tabetha