how much HP

Dave, That build up is very close to my stock stroke 340 and it made 480 on Dwanyes dyno. Will the 4" crank make much more hp or will it mainly gain torque and lower the power band ?

For what its worth my motor went 116 in the 1/4 before it had ore work done to the heads and another .5 in compression added which added up to about 25 extra hp.

I'll be real happy to get 11.80s out of it with 4.10s and a 26" tire and my converter which is probably a bit tight for the motor.