Have to use L18 block as a minimum or L16 needs sleeves that Baz has done to L16 and L18 block up to 89mm bores. However expensive but you pay for what you get, Baz has even made a deck plate from melted L series heads so he can bore and hone the sleeved blocks with the blocks tensioned up as if they have the head on them like Nissan does now to its modern engines for perfect sealing and bore trueness.