[RSupdate]

Depending on your needs you (heat or not) you need to get a set of SSI's or just a set of headers. Basically you need 2-out early style exhaust configuration.

But I note you live in CA. and your car is a '76....if you intend to drive on the street you will not even pass the visual part of the smog inspection with this new setup. So you need to consider if you want to remove/replace the original exhaust setup every 2 years in order to pass smog - if it still will with all the other mods you are doing.

Good Luck!!