If they are the single leaf set up from the later models, they don't seem to last as long as the multi-leafs from the earlier ones - I notice on my 95 Sportrak they have been changed at sometime and the replacements are looking tired. I'll do ours in the summer and will go for the multi-leafs which come with a built in assister as well.

Never done this on a Sportrak but have changed many on other cars - not a bad job, but be prepared for a few seized nuts and the like, and some have said the lower shock mount is fragile so be careful around there.

Dave with a Sporty