Dog bone retainer on a roller block

[Ratclge]

Bought a block disassembled,when installing the dog bone retainer i used two bolts i thought were the correct length.Ran them in to check fit and noticed the imprint of the bolt,is the emboss in the lifter valley designeed to prevent hitting the cam. looks that way to me need to know for sure 100%.

 

[suckerpunched]

I just had mine apart. the bolts are about 3/4" long. It doesn't take much to hold the retainer in place. do the holes even go through to the cam or are they blind holes