well ive been thinking of swaping to 4.56s ive got 4.10s right now there def better then my old 3.42s but i want more get up and go. my truck is a rcsb 2wd 4.8 with every bolt on i can do pretty much and a 3600 stall verter im thinking of maybe restalling it to a 4000 in the near future i plan on puttin a nice cam in it and maybe some worked over 243s my plan is to get this turd to run 12s na maybe 11s on the sauce i plan on running the 4.8 till it . the truck is not my dd so im not to concerned about MPGs

 

i got a set just for you ( 4:56s ) hardly used

 

Well if you don't care about gas mileage do the 4.56 they should add some more pep too it.. You will just have a short first gear. What size cam are you planning to run unless its god awful huge I would leave the 3600 in

 

who makes them?
dont really know what size cam yet im thinking in the 224 to 228 duration on a 112 lsa or maybe a 110 lsa

 

Stick with the 4:10s.. Specially if you ever decide to use nitrous. I've even read threads on here where 4:56s slowed guys down. 4:56s is just to much gear.

 

On what tire diameter though? 4.56 on 28" tires might be a little deep, but not so much on 31"-33" tires.

 

love my 4.56s...they definitely DID NOT slow me down, and work great with nitrous

 

and i run a 28" slick for racing and 30" tire for everyday driving

 

my drag radials are 29s and my street tire is a 30 what you turning for rpms?

 

With a 29" tire you will be turning like 2700 at 70 in o/d. I had 4.56s for a while with 29" tires and it would eat the tires off almost till third it was a blast to drive. With a 30" tire you will prolly turn like 2550-2600 at 70 in o/d. I run 4.56s with 33" tires and turn around 2300 at 70