If you support the engine in the car at the front of the pan and remove the timing cover, the weight will very likely bend the front of the pan upward.
The timing cover is the upward support for the front 4 inches of the pan. It carries half the weight of the engine and transmission. Approx 400 lbs.
Supporting the engine under the lower flat part of the pan, or from overhead, would be preferable.
In this 1st photo the wood support blocks are behind the separating line for the timing cover, and an engine hoist is hooked to the top of the intake manif. (and the transmission was removed)