Putting a cosworth engine into a mk2 harrier at the mo. Was wondering what turbo + setup I should use to get around 350hp? New to this turbo side of engines so keep it simple please. Thank you.

 

A t34 will make that power all day and love it.

 

I would also say a T34.48, but consider if you are going to want to go more power later, if so might as well buy a bigger turbo to start with and just have a little lag until upgraded engine wise, std cams/head will be fine too.
tabetha