Comp Cams Smallblock Hydraulic Roller cam setup

Will this set-up work in a standart LA block with no modifications?

I think it will need to be an LA roller block to use everything including the lifters above. If using a non roller block, your best bet is the drop in link bar style hydraulic lifters that companies like Comp sells. But those lifters alone are $$$. Im not sure if these lifters will work in a non roller block as I have never tried or looked into it.