Pushrod question

Searched everywhere but can't find what I am looking for....

Trick Flow Heads with the "recommended" Harland Sharp rockers require pushrods that are ball ends on both ends. The only pushrods I am finding are oil through and I am not running oil through roller lifters and now that I checked Harland Sharp's specs on the rockers, they too are designed for oil through. Is this going to be an issue?