450 bucks is a little high just for changing outputs.Sure you have to pretty much disassemble the entire tranny,but it's not that big a deal.Just get you a manual for it and you should be allright.You will need a slide hammer for removing the front pump but that's about it.Everything else is doable with just regular tools and some patience.Like WT said make sure you do it on a CLEAN table.You don't want any dirt in there at all.