1964 stepside c10 230 inline six

[crowdaddy]

First off, hello to anyone that reads this, and thank you in advance. My adventure in truckworld started a month ago after rescuing and partly fixing this wonderful old truck. It is still burning off old varnish but is better than it was. It has a noisy manifold and or exhaust leak maybe more. I'm underaverage as a mechanic, and will not do this part. How much can I expect to pay for a new exhaust, (manifold, and or seals in the area where the pipes hook to the block)?
I think this is where the noise is from.