Re: 14 bolt question??
Yes, you can swap to a 14 bolt FF, however, it will be 8 lug. If you want to stick with a 6 lug maybe you should look at the SF route. You can find either of these axles in the 88-98 trucks. I would imagine the earlier and later models would work as well, however I don't know about the lengths. Price wise, it seems varies across the country. Here in Tennessee I could probably pick one up for 200-250. Depending on what you are doing the SF may be adaquate for your needs.