Wow that's a hard one, I get emotional with rigs once I get one I want to keep it. but I do try to be realistic. I can only tell you what I'm doing the decision is yours. I have the 4.2 ant its no power house. With 35's and 4.10's I dont have enought horsepower to hold 60 let alone 70 on any type.of up hill, down hill is no problem, but going anything over 75 is scary!
I bought a 90 2.5l that I am planing a V8 transplant because I want more POWER! There are plenty of low HP Suki's out there, but driving down the highway? I can only handle an hour or so on the highway.
I plan on dropping back down to 33's and keeping the current one.
Just my two cents, Not sure it helps!