I bought a 96 tahoe minus the engine,I'm thinking of putting in a 6.9 or 7.3 IH motor. If I do a 6.9 or 7.3 it would be turbocharged ,and get a custom built pump. What I'm wondering is how much better are these motors than a 6.2 or 6.5. I'm having trouble finding a 6.5 with no cracks,I do have one with only one crack,but I'm sure it will crack more eventually. Supposedly the IH motors have a forged steel crank and have a nodular block, and use a headgasket with a solid steel core. Are these motors so much better than the 6.2 or 6.5 that it would be worth the extra work to swap into a chevy? After inspecting 3 6.5 blocks of mine and pulling the pan off a 6.2 at the junk yard I'm convinced they are all cracked or about to crack.