Nope, apparently they tried to get Peter Fernandez in to do the voice (they found Connie Orr), but when they couldn't they went with Billy. Now, mind you take this with the grain of salt that you take every internet story, but I don't see why it would have been made up.
If it's just the violence and car crashes, that wont cause any issues to keeping the dubbing in sync. A crash is still a crash, regardless of what language it's in, and can be easily edited around. If there are dialog scenes that were cut - well, that gets a touch more difficult to work around...
Astroboy was the first breakthrough anime in the US, but that didn't have the market saturation that Speed Racer and Star Blazers did. Arguably I would probably go with Robotech as the first really huge mainstream anime in the west (followed closely by Voltron).
That said, Speed and Star...
Well this was unexpected: Funimation Licenses Speed Racer, Noein Anime
I would have thought for sure that Guardians of All Things Retro Anime - Discotek - would have been the ones to release Speed Racer, not Funimation. What's more interesting is that they'll include the original audio AND...