Vipers Shed Their Skin is also known as Guns and Guts and it’s not an Italian western. It’s a Mexican one, directed by René Cardona Jr. (Tintorera…Tiger Shark, Night of 1000 Cats), and stars Jorge Rivero (Operation 67, Conquest) as El Pistolero, a killer who wants to finish one last job before he settles down with Chiquita (former vedette Zulma Faiad).
He’s joined by Esposo Abandonado, which means abandoned husband (Pedro Armendariz Jr.) and Prisionero Escapado, which means escaped prisoner (Rogelio Guerra) to hunt down a sheriff (Quintin Bulnes) who is hiding in a monastery.
The end of this movie is totally The Wild Bunch. To get there, you get a guy getting shot in the neck and bleeding everywhere and tons of female nudity, but the movie meanders on the way.
You can watch this on Tubi.