The 70 degree cam is a sports option part. It's listed in the Sports Option Parts listing for the B210 dated Oct 1 1977, Ref No R/B-210. The part number it's listed under is
13001-h5710. This part number is probably NLA. I've had a couple of cams of this grind here in Australia because somebody had a copy of the Masters, so they could make copies. It was a strong cam, with a wide power band, I had it mainly in an A12 with a 32dgv weber & it'd drive around like a stock engine, then blast off when you opened the throttle. I can't tell you the specs, but if you email Stewart Wilkins Rallying here in Sydney, the man I used to get them through works there. His name is Arthur Jackson, he might be able to arrange to get a cam ground for you, or at least tell you the specifications so you can get it ground there in Portugal.