Get a dial gauge and a degree wheel is the proper way. You can then plot the opening and closing points, and the valve lift..
If you pull it out, have a look on both ends- sometimes cam grinders stamp their cam number on there.
Also, get a vernier or micrometer and measure a lobe top/bottom and left/right, take one measurement from the other and that is cam lift. PM me and I'll tell you if stock or not.
Even a stocko 1098 cam is a bit better than a 998 one- has more lift and exhaust duration.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.
