I can tell you that ;
34 +74 +180 =288* intake duration and
70 +34 +180 =284* exhaust duration,
For a clutch car, that could be ground on a 108 LSA and that would make the overlap to be 70*, making it a hi-rev narrow powerband cam..
11.4mm is .449 inch, and 11.6 is .457
Depending on the tappet rise that the specs were taken at,
that could be a very big cam. It would take a lot of compression ratio to make it work properly, especially in a small engine.... Back then, we had the pump-gas for that, to prevent detonation..... but today we do not.
Without adequate cylinder pressure, I fear it would make a lousy street-cam, especially in a clutch car, as the bottom end would go soft in a hurry.
From the numbers, in a 318, this would want 11/1 Scr at 600ft elevation, to make ~160psi. And from idle to ~3000 rpm it will still feel like a ~273. At 8/1 the pressure is predicted to be just 106psi, and she would be feeling like ~180 cubes down low.
But I suspect this is a mechanical lifter cam, and so, the lash will eat some of this duration up. And probably the lift a well. So the bottom end might not feel as sad as the numbers might indicate.
Back in the 60s, there were less than a handful of cam grinders around.
good luck with your search.
