the easiest and cheapest way is as mentioned as above, turbo lump,

a turbo technics kit if any about would be quite a bit of money anyway, and adding a turbo your n/a engine compression ratio would be limited to how much boost u can run and stress your bottom end,

also holes for turbo oil feed/drain would have to be put into your block, along with ignition advance for a turbo engine, would just be more hassle

once u get turbo power, u will just want to keep wanting to get more out of it, hence using, a proven easy to tune rs turbo engine in the first place