which are better for street/strip but still decent on mpg 3.73 or 4.10 gears? which brand is best?

Which axles do i have in the stock rear end and which are better, 28 spline or 30 spline? And what is the length of the axle shafts?

i want to get lower profile tires, maybe 305/35/22's? will the 22's with those tires look good under a 2/4 or 3/5 drop better or will they even fit a 3/5? should i go with spindles or control arms?

i've done some research but still don't know which kit is best DJM, Belltech, mcgauhy's or other? i even see that eibach has one... but i want one with the best ride quality, depenability, so on also.

and for shocks... same there which are best? and are the eibach shocks suitable for lowered trucks? i've thought about the edelbrock's too.

 

what kind of truck do you have?
i would go with the 4.10s i really liked mine and it cost me hardly anything in gas. the only thing i can say is it may slow you down in the quarter if your not hitting third gear now becuase with them you will. you probably have 30 spline axles which are bigger than the 28s so i would say they are better. as for the drop question someone else will hafta chime in.

 

i have a '00 silverado stepside 5.3l 2wd ECSB