something to think about on solid cams is their advertised duration ratings. you need to look at how much lobe lift the seat timing is rated at. using the xs268 as an example I believe it is rated at .015" lobe lift, but the recommended lash setting is .016". to get 268 degrees on the seat with a true 1.5 rocker you'll need .022" lash setting. .016" lash setting is going to get you 8-10 more degrees on the seat. will that kill off some low end torque?, probably. looking at the 270 solid it's rated at .015" lobe lift but has .022" lash setting. would the 270 be more versatile?, perhaps. either way look before you leap. what got me into looking at this stuff is I bought a solid cam that was "rated" at 280 degrees. what I didn't know at the time was the 280 was at .020" lobe lift, but recommended lash was .020". long story short is my 280 cam actually has 295 degrees running duration at recommended lash. the only saving grace is the solid tappet. 295 hydraulic degrees would have been miserable for what i'm doing.