I like your attitude. The aluminum will probably work fine as long as it stays in compression all the time without excess clearance. That would cause other issues anyway.
I picked up a set of Comp solid rollers for a big block that had one bad roller, to try in my 340. The link bars are wrong and the bar mounts hit the block but I'm going to see if I can re-do the link bars so I don't have to grind away half my block and convert them from needle rollers to bushings. Before I do any of that though, I need to see how much lift they will go before exposing the band. If I can get .550 -. 600" out of them I think I will give it a shot.
