Hi yall! I have a 98 with the 4.6 and 3.55ls.
I run 305/70/17 tires and am thinking of going to
4.30 gears. Does this sound good or should I stick
with the 4.10?

 

hey Colt
I am running 285/75/r16 BFGs which are pretty close to what you have (33"+/-) I am actually getting ready to buy a new set of tires and will probably get the Goodyear MTR in the 305.
Anyway, I switched to the 4.10 and have been happy. with the tire change, the 4.10 gears seemed to put it back near factory.
The 4.30 would give you a better jump off the line, but you would be running higher rpm at highway and possibly decrease your MPG.
just my 2 cents worth

 

get the 4.30 you will get better off the line feeling and your mpg wont really drop much you will be at like 100 rpm higher than what you would be at with the 4.10, and if you get bigger tires in the futer you wont have to worry about your gearing