I don't know how much power he's making but SW ran a 10.01 at Beech Bend last summer, so he's got to be in that neighborhood or a little above. And I think JP H e n n e s s e y stated recently he only knew of 3 or 4 n/a Vipers with over 600 rwhp, and maybe one or two of those were at or around 650. In short, you better be sure whoever is doing the work 1) really knows what they're doing; and 2) isn't feeding you a line of bull about the outcome.