How much should a basic 340 rebuild cost?

Thanks for the info and opinions and ideas. All great advice. I have not made any decisions at all, just gathering options. I will have my X heads built if that's what makes sense after I know more. Yes, street car with good torque, streetable, not crazy, but fun, and decent enough mileage (ha ha) to drive around a bit.

I was unaware that we have a nearby O'Reilly's until now. I'll definitely stop in there.

Thanks again.
Just a suggestion here.
I just spent the weekend at Road America / Elkhart Lake for the Vintage Race Weekend.
Quite a few cars in the pits had stickers on their valve covers from Motor Masters in Hartford, Wi. They don't have a website, but have a Facebook page.
Motor Masters
(262) 670-9145
Good luck with the 340 build.