Thinking of going BB...

The 500 seems as if it has more potential, but it will cost more money in the long run.

The 451 would probably run fine with the 906's if I clean them up, but won't have quite the potential.

So it would almost be a question of how much power do I need and how much do I want to spend...

Also, the debate between the two was kind of based on the strokers kits from 440 source. Tomorrow I am going to try to get ahold of a machine shop to see how much would charge to turn a crank and balance the assembly. If that comes out to be quite a bit cheaper, then it will be 451.