While specific torque specs are crucial (and will vary slightly depending on the year and specific application), the sequence is almost always some variation of:
1. Start with a cap at the rear main bearing.
2. Then go diagonally opposite.
3. Continue criss-crossing until all are snug.
You would then tighten them to the specified torque in that same criss-cross pattern. Always refer to a shop manual specific to your engine's year and specifications for the exact torque values. Using the wrong torque can lead to damage.
Don't rely on just this general sequence. Find a reputable service manual or a rebuild guide for your specific 350 Chevy engine. This will give you the proper torque specs and the precise tightening sequence.