I mean, that is the safe way to do it but I didn't feel like spending an extra hour taking off my carb, putting together my hoist, backing the car out and jacking it up then hoisting the engine just to slip a 1/4" spacer under one mount. I did make a mistake using too small of a wood block which didn't go all the way across the bottom of the pan.
I've jacked the engine up like this countless times before with no issues, you just have to be careful and not rush like I did this time.