The panel has been modified over time. The radio on the far right is an old Narco 12A. The red acetate dims the VOR heads. The gauge to the right of the VSI is a GEM 602 engine monitor. The gauge on the far right above the Mk12A is a manifold pressure gauge.
(Click on any photo to enlarge it.)
The interior is 16 years old.
The first thing I did when I bought 33C was to install shoulder harnesses. If you are flying an airplane without them, you should install them.
Franklin 165. The engine has an STC'd spin-on oil filter on the other side.