Alot of money and work to get good power ups with an n/a.
If you were to double the hp you'd end up with car thats no fun on the street .....very cammy, unstable idle, nil power below 4000 and a screamer above 5500 + with a compression ratio of 10.5:1 or more you'd really need 100 octane fuel..................................on the other hand...if you were to supercharge your existing motor or engine swap to a suitable turbo it would be happiness all the way