Five bearing camshaft

[1946]

A question re camshafts: I have a five bearing camshaft and the motor only has the normal three bearing camshaft housing in the block, Can I use this in my rebuild, or is it better to seek out the standard three bearing shaft. Is there a difference in the grinds on the shafts, and am I correct in thinking the five bearing shaft is a very early one. The car is only used for general club outings.