...I'd like to be "all in" at $5k (or less); not sure what it would take to rebuild the existing, but I'm OK with spending some on top of that effort.. Hope this helps.
When someone asked toolmanmike how much his 273 build cost him, he answered about $3K. I'm buying parts now for mine, got the machine shop sourced, my guess is I'll come in between $2500 - $3000, too. We wanted to keep the motors original to the car. Like the guys say, however, you can get better bang for your buck with a 318 or 360 and more power.