Not sure if this is in the right section but... I have a 97 blazer 4x4 the 4.3 runs fine. I just put 31" tires on in so it seams very sluggish and I'm wondering which direction to go 4.10 gears or just do a 4.8l/ 5.3l swap. I'm sure swapping the gears will cheaper but the swap has more of a wow factor. Any input would be appreciated.