^ I think that's the biggest strike against the LT motors (LT1/LT4): They didn't make them for long, and hardly anybody is transplanting them anymore, meaning it's gonna get tougher in the future to find aftermarket support for them.
LS swaps are great. But you have to have a whole lot of cash up front, or a great shop to work out of and tons of time and fab skills. I DD my truck, and I'm wanting to go to Vortec heads and modify my factory TBI. (The GMPP intake really is pricey; I'd probably do a carb intake with an TB adapter.) A little cam, headers, tune, more fuel and better ignition should make a nice everyday cruiser. Would the mileage savings make a 5.3 swap worth the extra money? Probably, but I don't have the money on the front end, so it doesn't matter
