Headers for 70 C10 LWB 350cu

[70PU]

I am looking to put headers on my 1970 C10 Longbed 2wd with a 350 chevy and a TH350 auto trans.

I have been looking at a set of Headman headers from Summit Racing.

What I want is somthing that will FIT. This is not a show truck. It is only driven occasionally and will never see salt (Florida!).

And a few more questions..

any recommendations on Header gaskets.

and last but not least.. any recommendations for a good performing quiet muffler.

Thanks in advance
Shawn