I could increase stroke, but that would put more demand on head performance? Trick Flow made 687HP with 10.15:1 and 505 cubic inch with 270 heads. I somehow think that combination stretched some would reach 700HP+. Plus a little, not 100HP+.
Wont a stroke that long be hard on a 440 block ? They have a tendancy to split between the mains and cam ???????
Or did he say he was going aftermarket on the block ?