How much should I pay for 72 big block and A/C

[lts70]

I found a 1972 C20 deluxe, The body is toast but under the hood it has the most unmolested factory big block I have ever seen. It has all of the A/C components with not even the lines missing as well as power-steering with the remote reservoir. On the inside the floor boards are almost all of the way gone. But the dash is in perfect uncut condition with all of the A/C components untouched. I think it was a highlander as it had the orange plaid seat and was two tone orange and white with full trim. I poured some gas in the carb and she fired right up and sounded really healthy. the oil looked great and the oil pressure was strong. If I buy this truck it would be for just the engine, engine components and a/c parts. What should I be willing to pay? Thanks.