I guess I'll have to go get a 1/2 drill or borrow one. I know I shouldve gotten a stock oil pump or a high volume but it's what we had in stock. I'm building this 400-4bbl stock. It's already been bored .040 over, there wasn't a ridge just needed a honing, 3-angle valve job on stock heads, Speed Pro/Sealed Power Cam, Sealed Power bearings, Hastings Cast rings, Elgin springs, MP windage tray, 73 HP exhaust manifolds, 73 iron 4bbl intake, remanufactured Carter Thermoquad, and 73 4bbl air cleaner. So it's about as stock as you can get. Hopefully it will just be a good cruising car. I've got a stock rebuilt 1975 727, 8.75 with 3.91 posi, front/rear sway bars, Accurate dual exhaust, and the coolest thing a Standard gauge cluster from a 72 Highway Patrol Coronet reading "Certified Speedometer". I did want to add a tee and plug in a mechanical oil pressure gauge as well as my original oil light. I has a bad experience with my oil pump giving up on a winter road trip in Kentucky in my daily driver Ranger but it did have 228,000 miles but no warning and no changing that oil pump on the side of the road. Any articles on how to do a dual oil pressure gauge/light hookup anywhere?