hi there all just wondering if some one can tell me if the ba xr8 engine is the same as ba 220 3 valve engine, i know the heads and intake are different but wanting just to know if they are the same blocks, cranks etc.. cause i can get a ba 220 3v motor but want to build a xr8 motor using the block so will the xr8 4v heads bolt onto it and the rest off the xr8 engine parts can go straight onto the block