people drop turbos on both stock l67/l32 and the na l36/l26 engines all the time. our issue is the trannys are made of glass, a turbo can make up 500 hp, tranys cant take it unless you invest 3 more grand into the tranny.

theres no need to build a turbo engine, goes right back to drop another used block in the car lol

of course a cam, ported heads, headers and all that stuff helps. no need to touch the bottom ends. just run em, they are pretty tough and last if you tune it right.