Hydraulic roller rocker interference?

I am in the process of building a 1973 360 LA stroker (408) and will be running hydraulic roller rockers and lifters. I was recently watching a build on powernation and they mentioned that the lifter link bars can interfere with the block and the block may need to be shaved or machined to keep the link bars from scraping the block. I was looking at running the trick flow tfs 21400010 and was wondering if anyone knows of an interference issue before I order them. Thanks,

Brian