I was looking for an 821 myself for a long time with no luck. I had an 831, and occasionally seen a few of those for sale, and sometimes an 841 would pop up, but never the 821. I was planning on having SLR grind me an 821 with the info I have on this EMPI camshaft sheet. I'm not a cam grinder myself so I don't know if this is enough to go off of, but it should get you started. As you can see, it definitely needs 1.4:1 rockers with only .330" cam lift. Good luck, let me know what you find, and how it runs. I never got the chance!

