LS6 in a 1 ton 4x4 pickup application?

[combinefixer]

Thinking about purchasing a 1980 K30 pickup to have some fun with and restore some day. I've always wanted to have a truck with a high performance engine for some enjoyable running around. Truck currently has a GM 454 crate engine. TH400 trans and 4.10 gears. Would a 454 built to LS6 specs be too volatile for a 6000 pound truck? I know an LS5 would make more practical sense, just wanted to see what the thoughts were from the guys who have had 6's in Chevelles and El Caminos.

Thanks!

RW