I had a 93 for 7 years, when I traded it in for the new 2004 it had 200,000 miles on it. in my opinion, the V6 3.0 L is not one of Toyotas best engines, but solid, just the same. I found it to be underpowered for the highway and towing, but in 4LO it would crawl just about anywhere I pointed it, and I have been in some pretty gnarly places. Sometimes I still miss my 93 4R though, because it was manual transmission.
I never modified anything on it, and it treated me well while I had it. Not sure what mods there are for the V6 3.0L to increase performance. The only turbo kits that I have heard of for the V6 were for the 3.4 L. Just the same I have not researched it much.
I'd suggest doing a search here on V6 3.0L engine, and see what come up.
Good luck!