Do you need the hydraboost or can you run manual steering? The added expenses that I can see would be swap headers, maybe an oil pan, K-member (or you can modify the stock one appearantly), and the extra cost of the mod motor over the pushrod motor.

Hell, if you want a 302, give Adam $50 for that fresh roller motor in his garage. We can bring it home this weekend. Put a good set of aluminum heads on it and whatever intake you feel like and you've got a really good start.