Yes, you can keep your stock internals...you'll need to have an oil line drilled into the block for the VTEC head so VTEC operates (and functions properly and remains safe for the engine).

You'll also need a D16Z6 ECU.

Find somebody who is familiar with Honda's and knows his machine work and you'll be more than fine.

However, you should know you can get a full, reliable, properly functioning D16Z6 for cheap money...we're talking $500-$800. You'll be paying way more than that to get parts for your T-Belt, water pump, the purchase of the head and the machine work it requires, which is why this swap isn't very common in the first place. It'll bolt right up to your current car, you will however need the D16Z6 ECU and wiring harness, which you can find in a junkyard if need be.

If you're absolutely hellbent on this...

As far as parts, are you talking T-Belt and water pump? Go new, it's infinitely worth doing things right the first time.

Finding a D16Z6 head shouldn't be difficult, check Craigs list, HAN's for sale forum, and Honda-Tech's MarketPlace.

Good luck to you.