Using the rebuild kits, you can do it with hand tools in about 2 hours, maybe less. Have plenty of rags on hand and be ready to get messy. But it is very 'doable'. The hardest part is usually tapping out the kingpin bearing races, but you can do it with a hammer, a drift (or old flat tip screwdriver) and a little patience.

Bill
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God Forgives, Rocks Don't...