275 Supercharged cummins jake brake

Looks identical to my 1953 ( model 351 ) I sold to a fellow in Butler, Mo. back in the mid 1980's. I had aftercooled the NH 275 with a NH 220 box and built a connector into the air cleaner. Had a 5 x 4 trans . This very old peterbilt (I think it's a 49?) has a 275 supercharged cummins with 5" stacks and a small muffler underneath the truck. With no turbo on these old cummins the muffer didn't do much as far as muffling goes. thanks for keeping the history of old semis alive That was awesome! Would like to see more of it if possible.