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The general issue is higher HP A-Series engines mean higher revs which means you sacrifice the bottom end power to make it happen up top. So they become quite a handful to drive in cities and suburbs as you are forever using your gears to have the right rev range (power-on) to suit the drive, hill, corner, decent etc.

The next issue with big HP is big torque, this will need you to upgrade both gearbox and diff as the slightest bit of punishment will see them split. If you drive like a granny then stick with the stock diff and gearbox but that sorta defeats the purpose of you having built the engine.

So I guess the trick is to make a powerful street engine, which is where you should start looking at forced induction, or manifold design and specific cam profiles. (But even turbo engines can be a bit of drama).

Personally, I would build something more like this.