Since you're in So Cal, like me.. before you make this jump to a V8 conversion, I think you need to consider how you are going to get it smogged here in commie-Cali. I'm not sure, I've read differing opinions ranging from "no problemo" to "no-go, cuz this V8 engine is for a heavier class vehicle" or some legal mumbojumbo like that. So.. unless someone here knows the definitive rule for smogging these V8 conversion land cruisers in CA, or you know-a-guy who can smog this kind of a vehicle.. it's just something to consider before you drop a big chunk of change on this truck.
But, those pics do look sweeeeet. Where's the price??
The very pricey alternative to be totally California legit, would be to buy a brand new crate Chevy LS3 6.2L E-Rod motor, which is CA-CARB compliant, and comes with a certificate stating so. But, that's like an $8300 engine,.. before the transmission and adapter kit, installation, etc..
Chevrolet Performance LS3 6.2L E-Rod Crate Engines 19257230