Planning 318 build for daily driver

I'm new to the board and was looking for advice for a 318 setup.

What I'm looking to accomplish
1. 250 - 275 RWHP
2. decent gas milage
3. low cost/biggest bang for buck
***remember Daily driver***

I haven't purchased anything yet, just trying to get an idea of how much it will cost me and what is involved. I've got no problem with swapping parts in an engine, just don't know where to start.
I have a couple of leads on an engine - 87 fifth ave for $200

Thanks
Matt