B1duster. Yeah, I thought the design looked beefy too. I like the “girder-like” ribs supporting the roller axle and the extra meat around the shaft that previously had been reduced by the needle bearings and bearing cage.

What diameter springs do you have ?
Have you mocked them up yet ?

This is really interesting. Mine are full roller, and their website describes a full roller unit.

I currently have my stuff apart. I’ll check the shafts for wear next time I’m in the garage.

1.54 diameter springs; I haven’t mocked them up yet. I don’t anticipate any clearance issues, but I’ve been surprised before.

I've never built a street engine with aluminum rockers before so I'm a bit nervous about the aluminum. These rockers look really beefy though and with the bushings I think I would be safe. Putting my order in tonight so I can get it done before the cold weather sets in.

Thanks for all the responses

Gus