72 rear suspension options - question

[jocko]

It's my understanding that stock C10 rear susp was coil spring with trailing arms. But a leaf spring susp was optional.

Question - I've seen two different leaf spring suspensions on SPIDs -
1) R-Susp Leave Spring (RPO G70)
and
2) Heavy Rear Spring (RPO, not sure...)

Was #2 essentially an "option" IF you ordered #1
(in other words, I've seen these options listed on the same truck).

Now, personally, I'd prefer coils n trailing arms... But, wondering your opinions on the pros/cons of the leaf spring rear suspension - things like ride height adjustability (I notice the HD leaf susp sits rather high) and also curious about coil vs leaf ride quality.
thanks very much for your help.
jocko