Bodyman needs tech help

[myfirstsvx]

Hello all. First of all thanks for the great site. Seems you guys really know your SVX.

Anyway I just purchased a 92 LS-L That I believe has a slipping tranny. It has 108,000 miles. I sold a 03 mustang gt paid of a bill and bought this thing on e-bay. I must say I love this car If I would have known how great this was I would have sold the mustang years ago. This car is completely stock and needs a little TLC so I figure if I'm going to fix it I want to make it better at the same time. So my question is what would you suggest for a daily driver. From what Ive heard the 4.44 swap sounds like the first step. what should I look for in the Tranny (95-98 Legacy) Is the underdrive pully worth doing. What would the ECUTUNE chip do for me (will I feel the difference) I have done a lot of mechanical work but I am a body man and as such don't know all the tech stuff involved especially when it comes to auto trannys.

thank you for all the advice in advance.