Thanks guys.
I guess another reason why I prefer the 4.25 vs 4.50 stroke is I'm keeping my 5 speed Passon Performance transmission and it's rated (conservatively) for 700 continuous ft lbs of torque. If I start shredding it, there aren't many 3 pedal options, and a Jerico or Lenco would not be much fun on the street, as far as I know.
I'm concerned about going too far with the build, making it into so much more than I had intended that I enjoy it less than what I have now.