Trying to get 400hp from a 360

I'm trying to get around 400 horse power out of a 360 that will be a daily driver and use pump gas. I have a complete 360 that is going to be pulled apart for the block and then built up to (hopefully) the 400 horse power I want. Open to any and all proven combos. Looking to keep it around $5k and I hope that doesnt hinder this build.

As a side note, I've tried using the search function and came across a thread that was for 11 second combos...not too many were 360's but I'm thinking these would be different combos for a racer?