Pride gone... asking for help

I hope its just surface rust on the valvetrain, you can wire brush that stuff off pretty good, but not while its on the motor. Removing the head is like a 2-3 hour job with all that AC stuff attached but will yield all the info you'll need to determine what shape its in. bore wear, cylinder condition, depth of rust migration. head gaskets are cheap at rockauto unless you got a local place that wont get you on shipping. I got a closeout MAHLE head gasket for $6.00 once. I can guarantee your valve seals are gone too. just plastic bits in the pan by now. Evaporust in a 1 gallon jug is a great restoration tool, drop all the rockers in bucket of that stuff overnight and the rust will 'evaporate".
1973 DODGE DART 3.7L 225cid L6 Cylinder Head Gasket / Head Gasket Set | RockAuto