I think GM has a HT383 stroker that will give more power at a reasonable cost. You're looking about probably $6000-$7000 to do all the adaptation of the old 4x4 truck to Gen3 stuff. Since you're doing this for your dad it would be best to keep it friendly to what he's used to seeing in the truck. Have you looked for an engine at sdparts.com or crateenginedepot.com ?
See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709
The bigger issue than the engine is the transmission. I'm sure that with any amount of searching I could find the perfect small block for this application, but I am not a fan of the SM465 trans. I've had pretty limited luck finding reman ones, and I'm hesitant to buy a used one after how many I have seen go out. Anyone know the length of the 6.0, NV4500, and an adapter like the one from Advance Adapter? How does it compare to the 350/SM465 length?
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