borgeson Manual swap.
It has a manual steering and i find it uncomfortable, too heavy
Define "uncomfortable, too heavy"
If you mean it is too hard to steer, any manual box will be the same or worse.
If your current steering is OEM it most likely is 24 to 1 (about 5 or 5.5 turns lock to lock)
Any box with 20 to 1 or 16 to 1 etc will just make it harder to turn.
If your intent is to make it easier to turn then power steering is the only practical way to go.
Or get to the gym and work out.
Personally I have a 67 Dart GT, 273 v8 with manual steering and manual brakes, I do not find it an issue to drive at all. I can (just barely, but I can) palm steer into and out of a parking space.
My dad always said " The parts you don't add, don't cause you no trouble"
You do know how to hand over hand steer?
Bottom line answer waste of money