While I don't "know", my gut is no, not possible from the factory.
GM Powertrain is as interested as any business in wisely using up old stock, and minimizing scrap.
But yes, intakes are different. GM did not tool up and cast TBI injection intakes to Vortec heads prior to the introduction of Vortec heads. While it would later become a popular conversion, never happened in production. Even IF they had the intakes, and they ran out of swirl port heads (why would this happen?), they would not be able to sell the combo due to lack of emissions and MPG testing. The Govt. puts the modern manufacturer through all kinds of hell to get certification of these engine combinations for emissions. Then the potential change in MPG numbers, which are CLOSELY monitored for CAFE.
If you were asking me if this could happen in 1965, I'd day yes. And we see many items from the muscle car era that were not supposed to be, but did happen. But not by the '90s.