Agree with Steve, I'd want to see flow sheets, or I'd negotiate w the seller to pay to have a few ports flowed. Also would be nice to know what valves were used in the rebuild process.
Value wise, in my book & ive had quite a few sets, IF they were just clean untouched cores they're worth more than 6X-4's & garden variety 62 & 13 casting big valve heads. With the work described, it's going to come down to, was the port work effective or a butcher job?
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