I have a 76 k/5 Blazer. It's got a 400 small block. I'd like opions. I plan to stay small block, but is a 400 better then a 350 for off roading ??? This engine runs fine, no need to replace yet. Just thinking about future possibiltys. I do plan on installinng a COMP CAMS "EXTREAM 4X4" cam. probley the one with 262 duration. A HOLLEY dualplain highrise (tall) intake manifold, and a set of HOOKER headers. Yes, all the crome crap is a must aswell. Probley a gear drive to replace the timing chain, love that sound. This truck had a valve job about 4000 miles ago. I might get a set of COMP CAMS "HIGH TEC" rollor rockers. Oh'well, just thought I'd ask everyone's opion.