Brainstorming Ideas for 400-450 hp 360 Build

Stroke to 408. easy 450 hp with trick flow head or edlebrock and much milder cam than a 360.
No matter what head you use on the 360, it's gonna take a radical cam to achieve 425 hp the midrange of your goal.
A 450 hp 360 will not have good street manors.
Spend your money wisely once. build a 408.