Looks like the added/replace the exhaust manifold, that’s a pulse manifold that came out in the early 80’s.
Also, being that old, you have absolutely no idea what parts are in it. The tag on the fuel pump will tell somewhat how it was calibrated. However, when I had my Cummins BC, I would tamper with the button and spring in it and turn the screw for more fuel. So it’s a hit and miss.
Yea it runs good, the guy I bought it from said it’s 350 but I’m not sure. I plan on fixing it up the best I can, so I figured I’d need to no what model to order parts for what cpl
