408 stroker vs. 500 stroker Challenge fun!!

Love the repiles, not suppose to be easy this is why it is a challenge! Now to answer a few questions. I am wide open for ideas, I have access to both k frames and mounts already, both motors and transmissions are complete stockers. As far as the budget is concerned there is a little room but we have to start somewhere. Personal goal of a 100 horsepower for every thousand spent. Lets see some recipies please, whatever we come up with collectively will be built.
Thanks for participating:glasses8: