Racer Brown

They are almost the same cam, except the purple shaft has the lobe separation spread two degrees, (110 instead of 108)so it will like a tad more compression. I have the DC4120655 for the 360 I'm putting in my duster. Probably not the cam I would use if I was buying one today, but I've had it forever, may as well use it.
I have also used the DC .528 in a friends 340, although it wasnt the cam I had recommended. I had pushed him to use the old crane 250/260 .560/580/08, but some knob told him it was too big and he lost his nerve. It (the DC 528) was a decent street cam, but a little small, but it was very close to the old Racer Brown ST 21. As far as that goes, IIRC(might have the wrong Racer Brown grind #) the ever popular DC 509, is just a re-pop of the old Racer Brown SSH10