Reply to "Holley Mechanical Fuel Pump Install"

...Turn the Engine over by hand to make sure the Excentric is at the 'Low' side Heel! Then Your not fighting the spring in the Pump to get it into position. The 351 Cleveland mounts the pump with One Bolt and One stud with a Nut. Install the Gasket First!
The stud is on the Bottom so You can hang the pump up on it then install the nut;(The mounting hole for the Stud is SLOTTED so You can put the Nut on first and then 'Hook' the Pump onto it)Loosely. Screw in the Bolt. You may want to put washers under the bolt and nut. Tighten Both up evenly!

NOW! My advice is to carry a spare electric pump ready to wire-in tempararily, just to get You Home!! Because the Holley Mech. Pump uses 'Pressed-in' Check Valves! One of them 'popped-out' inside My Holley Pump and left Me stranded until the Transport arrived! I've been useing the Electric ever since. I took the Holley apart and found what I described. When I get around to putting it back together; I will be sure to 'Lock-Tight' that check valve, when I press it back into it's Counterbore!!
Otherwise They are a Great, Beefy Pump!
Use a Fuel Filter on The PRESSURE Side. And use the Steel Can Style!! NOT a Plastic or those Glass see-through pieces of Crap! Try to place the Filter as far away from ALL heat sources as Possible. You've been warned!

Good-Luck with It!