Looking for the right path!

I have a 73 Duster 340. Just pulled the motor/727 trans out Saturday. Budget plays a big part in any of this as most of you know. I "think" I want mid 400hp on 93 Octane in a streetable setup. I don't like throwing numbers out there because I don't have a lot of experience. Brand new to muscle cars and even newer to mopar. Basically I want to be pinned back to the seat but have great handling around turns. Just back roads, no auto x. Motor and trans both have 100k miles. What are my steps from here?? Thanks!

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