Yeah, there were a few reducers and spring rate differences but overall they were mostly the same. Idle is 375 RPM. That's right on the verge of starting to creep. At that speed the torus is turning about 280 RPM. It'll start to move about 400 RPM. I know the bigger V8 torus was trimmed to not creep until higher RPM, so you may find using a Caddy torus will work better for your Olds engine.