Yes, the 57 master parts catalog shows that 235 trucks used the 261 solid cam, starting in 1956.
Cars starting in 1954 used a hydraulic cam with the same power curve as the 261 solid cam.
They had about 230 duration.
I went with a 254 duration in/ex cam grind for my 261 bored .060
The larger displacement can handle more duration and lift, without getting poor idle and low rpm performance.
