It was an empty block when I first saw it Tim with nothing attached. Here are the pics of the side of it..
http://devestechnet.com/Images/Restorations/1950B/D50b00411lg.jpghttp://devestechnet.com/Images/Restorations/1950B/D50b00038lg.jpghttp://forums.devestechnet.com/filedata/fetch?photoid=1197&type=largeThe pipe with the T connector came with it, so I just used it the way I got it. Oil pressure is off the T. The engine shop didn't tell me where they got it, and I am sure if I called and asked he wouldn't know because its been over 10 years. If I find anything out I'll let you know.
Oil pressure is great. Good flow to the rockers, no complaints about how it runs at all. I wanted hydraulic lifters in this build, so got the proper cam, rods, lifters, etc to do that. Very happy with how it turned out. 5/8"? Really? Thats a long ways!!