Want to learn to fly IFR old school with steam guages and no gps in my 74 m20F. Right now the only equipment i have is single kx155a with glidescope. Not interested in purchasing IFR gps at this time. What other equipment would you recommend I install. I'm thinking second com/nav radio with second CDI , and a maybe DME? Not sure if it's worth the money to upgrade panel with antique equipment. Will I want DME? Will i want second com/nav and CDI needle? How about ADF?, NDB?... What other equipment is useful that I could install for relatively (for ga) cheap? Planning on updating panel with IFR gps and ads-b transponder in 2020 but till then just need minimal equipment to train and fly occasional light IMC.
Thanks for any input.