They weld up the factory push rod seat and move it closer to the fulcrum. I have some pictures of my ER rockers(1.8 and 1.85) compared to stock. Let me dig them up...
Edit:
Originally Posted by Booba5185
Here are the 1.85s vs. stock:
1.8s vs stock:
Retros, LEDs, SD Hood GMPP, Votland, Addco
06+ Impala brakes, L76 Springs, ERs, Self-Tuned, 3.5 Gen V L32, Ported TB, 240a CS144, SSAC, Upgraded Transmission, Android Head Unit, Remote stuff, GXP Seats