Chad Lee,I want my freshly built motor broken-in BEFORE installing it back in my GTX. My main reason to dyno it is to make sure there are NO PROBLEMS with oil pressure issues..oil leaks,etc.,etc! How much power it makes is SECONDARY to me. I'm sure with Jeff's head work...and nice ROUND cylinders,she'll do just fine! Having the person that put the bottom end together,pulling the levers on the dyno,is another good reason! I call it "insurance"! From the responses I'm getting,sounds like the Stuska is slanted a bit toward the stingy side...which to me,is preferable. I had the engine tune pretty well dialed-in,before Jeff did the heads. I'm sure it'll be a whole new ball game now!...just ANOTHER GOOD REASON to "Dyno-Tune" it,before installation! In my opinion..$500.00 well spent,for sure!