Need help to identify years

Got a call from Geoff at Champion. Will be calling him back this week. Info from his message and e-mail indicate a a /6 rad in production a few months from now. But, for a little bit more, they can take the V8 rad and re-weld a new tank with correct outlet and petcock locations. Still comes in right around $300 with the extra labor. Seems pretty reasonable to me considering Griffin and Be Cool rads are starting out at $650+. As far as tube size is concerned, I'm running a relatively stock /6 which never runs hot (except when the brazed the braze on my rad tank fails again). So for me, the champion should more than do the trick. Would be interested in fabricating a fan shroud in the future as an extra measure.