You want more power. You want fast action. StreetWorks Solenoids have it. They work the way you want, with 40 pounds of pull so they work with original latches. Solenoids, cables, pulleys, connectors, wire hardware and instructions. Solenoid and bracket measure approximately 2-3/4" wide x 2-1/16" high (thick) x 4-1/4" long.
If you need more power than these solenoids have, you have a door problem.