How come you don't like Corvettes?!
Seriously, I love the older Vettes. When I was shopping for my first car I found a silver 1968 L88 4-speed car at a good price, but I was a about $2K short and dad said he wouldn't help me buy something I'm gonna kill myself in. Man I wish I had that car now!
So, back to your question...
It's not hard to build the kind of power you're looking for with a Cleveland. So first of all, determine how you're going to use the car and what kind of driveability you're looking for; everything else will follow from this decision. Next, what does your engine builder recommend? Often, it's best to go with your builder's recommendations if you expect him to stand by his work if you don't get the results you're after.
And don't waste time or money R&Ring the iron 2V heads. Determine what a decent set of 4V closed chamber heads would cost (shipped to you) as well as the cost to R&R those heads and set them up for your application. Then compare that to the cost of a set of CHI 3V or 4V heads (if your bent on 4V heads); I think you can get a quality aluminum head for nearly the same money (maybe more) as you'd spend on old cast iron heads. There are other aluminum heads which are capable of meeting your power goals as well, but they're all 2V heads - hence the importance of talking to your engine builder. And avoid ProComp heads like the plague - they're cheap Chinese knockoff's of CHI heads that tend to need more $$$ in machine work to make them half-way decent than you'd spend buying quality parts. Anyway, your cam needs to work in conjunction with your heads as a system.
FWIW, I'm running Edelbrock aluminum heads on my 383 Cleveland stroker that have been ported and have larger valves than what they come with from Edelbrock.