Sorry, I no longer come here and didn't see you responded. The term "Vortech" has been used by GM for over 20 years now, and was applied to various engines including most of the later V8's from the 350's to 454's and even the 4.3 liter V6's. I think back a few years ago Tom Langdon was modifying HEI distributors from the V6 engines to work in these inline engines. And its possible the springs and weight kits from those later engines is all that are still available from GM as the early components for the original 250's and such may be long discontinued. Mr. Gasket still makes their spring kits though, and whether the "Vortech" parts you purchased offer any advantage or benefit over these aftermarket parts is hard to say. It may be the fact that's all that is available from GM and nothing more.
