inline 6 is a classic design, most older big rigs run inline 6, a lot of trains run inline 6 as do many marine motors, that being said they are mostly diesel powered..It ain't going to be a rocket ship. but if you can take a little bending over not a bad deal. (how tall are you?) 150k is a lot of miles on a gas motor, but i loved all the dodge slant 6 motors I ever ran.