Hi. I’m looking at a 4200. It’s got Larini back boxes which i don’t like & I‘d want to remove. As part of the deal I’ve have been offered a swap with Maserati originals from a GS but obviously the valves wouldn’t operate so it’d be ‘open’ all the time. I’m thinking I’m better off getting some original 4200 ones from eBay. But what do people think?