Engine dyno, with everything hooked up...Everything externally is absolutely numbers correct original. Probably could bump the numbers up a bit with better exhaust manifolds on the 389, but it has what it has. Internally compression has been lowered a point and a half, with hydraulic rollers, roller lifters, good screw in studs etc. And ofcourse everything has been balanced. I can't wait to start driving some of these
...DW