Need to replace my valve seals who what where?

Standard umbrella seals. 1973 DODGE DART 5.2L 318cid V8 Valve Stem Seal | RockAuto
I use teflon seals in everything but they require machining the guide.
You will also need an air-hold fitting and spring compressor to change them in the car.
Engine Tool Valve Holder Parts | RockAuto
Mancini Racing Valve Spring Compressors, S/B Chrysler