Brainstormin' 440 vs 5.9 ...

I’ve been the one of the biggest opponents to the big block but I still think you should put it in over the winter and spend next season making it faster. Put it in the way it is now, run it, and make it less slow over the next year.
I just might do this ^^ . But, if it's a slug pig, I would make changes before even taking it to the track