Looking for specs on the main studs for the aluminum block. Thread pitch, length etc. specifically for the oil pump pickup stud. My engine came with studs, but has a stock bolt for the oil pump. I already talked to ARP and they said their stud is not long enough to fully engage the all the threads on the aluminum block. I also talked to Arrow/Prefix and they did not respond to my repeated emails and questions. Looking for specs to find another stud from another engine maybe? LS etc. ?!?

My motor is at the machine shop and this is holding it up....

Thanks