Cam re-grind

First, please always state the engine . Guys here knew enough to figure it out. When grinding lowers the base circle, most engines need longer pushrods to match. But, your slant has adjustable rockers, so if within range should be OK.

Yes, they can add material to the lobes before grinding, but expensive. Wheeler Dealers did an episode for a rare engine. But, slant cams are easy to get.