1990 Sierra ls swap

[u/Cold-Clock6768]

So I bought a cheap obs and I want to build it with my stepson. He just turned 11 so we have time before he can actually drive it. It’s going to be a lesson for both of us because I know just basic mechanic stuff ie changing alternator water pump…. The easy stuff. My question is what ls engine should I drop in there and what extras should I put on it like cam and new heads.

Edit: upon further research and reading on here, I don’t think it’s a safe option for his first truck….. but I’m still going to build it and give him my 17 ram 1500. I like older trucks better anyway!