I apologize for this being a non turbo build question but I have been to several forums and no one has a clue about the 231. I rescued a 231 from a '85 Delta and I plan on using it in a Datsun 4x4 and I have a few questions. I debated on doing this build because I keep hearing that the 231 is not a reliable engine. Everyone that I have asked has told me to go with a 4.3 Vortec. I plan on using the truck as an expedition type truck so I need something that I can depend on. I was told that this engine has a knock and that it is a total loss but I haven't check anything yet. Would it be safe to turn down the crank or should I replace it? I'm starting to gather parts for the build and I already have some .030 over pistons and a Performer intake. I've been trying to find specs for the stock cam so I know what to look for. I really need some info on how to do the build for torque, fuel mileage and reliability. I don't need a fast truck; I need one that will get me to the trails and back. I appreciate any and all help with this. Thanks.