Can I "borrow" rocker arms from my '65 273 for my '71 340?

I tried to use 273 cast rocker on my 360 Engine with RHS LA heads and the rockers were hitting the valve springs retainers so that was a no go for me. Maybe because my valve springs are wider that stock ones? Also I tried a Crane ductile iron set and they hit too, less but enough to make it a no go.

I had to put cheap Proform rocker since it was the only thing that I have in hand, but I'm not confident with them, I will move to Comp Cams Magnum Steel Rocker as soon I can spend the cash. For now I'll have to stick with the Proform, only thing that I did for peace of mind was to replace the locknuts for with a Crane set.