I have had one since they first came out, out the box uncleaned or gasket matched it made 260rwhp and 290rwtq with the following other mods: "f" cam, ported E7's, 75mm tb, 75mm MAF, 30# inj., long tubes and pro-chamber, 1.6RR.
Now with the 331 I have it still seems to be doing ok but I am about...