SDI was a bluff, there were no actual specs to pass. If there were, Reds could have it as fast as it were first tested.
That's my point. But the Soviets weren't certain of that at the time, and subsequently folded their cards in response to the apparent threat. The Reagan administration waged an active and extremely successful disinformation program with regards to many types of critical technologies that were of interest to the Soviet military and industrial sectors. Many of the technical specs that were stolen or bought by the Soviets were bogus, the result of a deliberate plan to pass flawed (or, in the case of SDI, made-up) blueprints and documents to them. This program cost the Soviets tens of billions of dollars and yielded them nothing of value in return.