I currently have a 6.2 NA I've done all the mods to it except different exhaust manifolds and I still want more power. In hopefully in 2 months I'll be getting back from deployment form the desert so I got some cash to spend. I don't really foresee getting rid of my blazer for aleast 5 yrs. So I think 6.2 banks sidewinder. Now I'm trying to get real cost of this project. Everyone says to make the engine last put in different pistons,rings,sleeves which kind(part #), also how much would a new crankshaft cost or just inspect the old one. All the labor me/dad/brothers can do plus it would be a great learning experince for me. /forums/images/graemlins/weld.gif /forums/images/graemlins/grind.gif Now my dad has an extra 6.2 sitting in the shop that we can set everything up on it and pull my old motor out and just drop the new one in. Then my dad can take my old motor. Other random thoughts now I've read that using 6.5 heads can give alittle boost in power but at what cost. If it would just be cheaper to look for a wrecked truck with a 6.5. I could go down that road, but I rather have a clean slate and know where I'm at. sorry if this been covered woods P.S. throw any other ideas out there, I've got nothing but time on my hands out here, such is the life of a com dog!