indy block question

starting my plans for my 68 cuda. this is going to be a street/strip car. i want 800-850 horsepower. pump gas would be nice, but can go either way. i'm thinking about an aluminum, indy low deck block. i would like a 572" motor, with b-1 heads. question is, will a low deck block take a 4.5" crank? would this combo be the way to go in my A body?
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