If you put top dead center on a ls motor can you take both springs off?

Yes, if the piston is at top dead center (TDC) on an LS motor, you can remove both valve springs without risking damage to the engine. At this position, the valves are closed, and there is no tension on the springs. However, it's important to ensure that the engine is securely supported and that you follow proper procedures to avoid any potential mishaps.