My Challenge to U /6ers....
It ain't our decision or up to us to figure out. If somebody has to talk you into a slant, you don't want one in the first place. Not trying to be smart...just the opposite. 250 HP from a slant with a 1500 buck budget is not very realistic. A 250 HP slant will be a VERY hot slant involving some pretty expensive cylinder head work.......OR some forced induction OR nitrous. By their given number of cylinders, they are not going to make as much power as a comparable V8. This is a fact that slant lovers already know and accept. They do it for the love of the engine.