I have the older type kitchen lid ( because I used 82 westy kitchen unit in my Syncro tin top to westy conversion), I think it changed post ’88 but not sure. The change was to the leading edge of the kitchen unit, lowering it which allowed a little more reclining of the driver’s seat back.
Anyhoo, I think both versions use the annoying “broken leg” style support strut to keep the lid up. I really didn’t like the strut. Finally today I changed it. Used a gas charged strut bought from banggood, the listing is here. It’s a small strut with 100 N (around 10kg force). I wish I could have used at least some of the screw holes from the stock strut but hat wasn’t possible.
It is good, i was concerned that 100 N was too strong, but the placement of the strut in relationship with the hinge etc turned out to be perfect. And as a bonus, and this wasn’t planned explicitly, there is an “over centre” force from the strut when the lid is closed which gives a satisfying positive latching force. But I do I wish the old screw holes were gone.
Addendum May 2017
As requested, some measurement pics. Enough there to give you a start.