Aluminum Roller Rockers questions

They SHOULD be Made in USA. They are discontinued, but Summit still shows the available to order individually, if you type in the exact correct part number.

Here's a link I found for big block versions:
http://www.forbbodiesonly.com/moparforum/showthread.php?4540-Speed-Pro-roller-rocker-mystery

Mine do not specifically say Made in USA on the box label like those big block ones, but Federal Mogul should be quality parts. Right? :-)

I figured these looked like a very similar design to Hughes rockers, and was thinking I might contact them to see if their shafts would be a good fit for these. I think so, having the improved oiling just like tubtar recommends. But will new Speed Pro RS-626 shafts work too? I guess my doubts here are because you can find those for a fraction of the cost of the Hughes ones. Because they are so cheap, I question if they are stock replacements or performance versions. I thought Sealed Power/Speed Pro meant performance versions.

I paid $125 for them from another guy on a hotrod forum, which was why I picked them up. My intended application is for a 340 that will be mainly street friendly with just strip time for fun. I'm definitely looking to go hydraulic cam, maybe roller cam but I doubt it for the extra money it will probably cost. Planning to buy Edelbrock RPM heads. I have no idea of cam size yet, but nothing outrageous as this car will see highway cruise time and again mainly on the street. I'm after a little nasty running 340, yet plays nice too.