He had told me that the PO had changed the complete engine but I drove over today and it would seem that he only changed the block and is using fuel rail of the 91 so no changes to the regulator is needed. Below is the pics of one of the injectors closeup. Its a
fuel flow: 21.0lb/hr
Here is his header
The problem he is having is he suspected a bad pump but found that his regulator was faulty because he wasn't getting enough pressure. He wanted to change it but then I asked him if he had the 98 fuel injectors or the 91. He said that they were the 98s. This is where I told him that he would need a different regulator and the stock one wouldn't work. After checking myself, he was wrong.
Sorry for wasting everyone's time.