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You might as well get 4.10 everyone else does. Its gonna suck if you go up to race your stock gt with 3.73 and race another stock gt with 4.10. I would get 4.10's unless you plan on getting f/i later on then I would get 3.73
Seriously dude. I had 4.10's in my truck. It did great on the highway and that was a 5.7 chevy truck. Ofcoarse your MPG will suffer but only by maybe 1 mpg