So the drama is i have a budget of 10k

I have decided to go for the v8 purely becasue with the current prices of fuel here in WA there is no real advantage with a diesel and i just love the v8 for beach work.
A few questions i have
- Do these cars benifit from a sport tuned exhaust system??
-A dealer has here a 93 with a 3.9v8( I think it was updated), auto and he wants $8k and 1.2k for 3 yrs of good warranty. It is so stock its not funny and has done 190k. Does that sound like an okay deal??
- What year would be the best to go for and what engine is the best to get in my price range.
This car is pretty much gonna be a daily driver with some beach work thrown in and the occasional dirt track.
Thanks heaps in advance for your help:)
marc