70 Roadrunner/satellite horn question

how many horns, 1 or 2? I have searched several articles and get more confused the more I read!!!

RR will have only one Meep Meep horn.
All other models could have either a hi horn or the hi/lo horns.

Road Runner had 1. Satellite had 2.

70 Road Runner has only one horn....beep beep style

Pretty sure all other 70 B bodies have dual horns (hi & lo note). I know for sure GTX & Charger have dual horns. It's possible some base trim models may have used a single horn. Someone here will be able to confirm.

I think the dual horns was part of a option package

I don’t think I have seen anything but dual horns on b bodies, except the RR. The had the single beep beep.

J31 is the option code for dual horns so, yes they were an option. Seems most cars got dual horns but not all. I've had several base line cars with one horn.
Dual horns were also included with other option packages.