I'm pretty sure my suspension has never been overhauled since it left the factory in '92

Question is - What parts should I be ordering for the build? Is it a worthwhile thing to put the 'R' model springs in it? or other? or stock SP best?
I weigh 70-72kg's with all my gear on, height 5'11". Can I assume that the recommended HRC specs, abait, with a 12.5W oil, will do the trick?
With the rear unit, is it a safe assumsion that I should give it to a suspension builder to overhaul? What should they be doing to overhaul this rear unit?
Thanks for any reply's!
Lachlan
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........."I love the smell of 2-stoke in the morning.......Smells like victory"............
MC21 Pentax SP...... TYGA'D