Would the sentence still mean the same if I use "large portion" instead of "good portion"? Is the word "good" often used before "portion"?

Native speaker’s answer
Rebecca
Yes, you can use "large" here! In this context, "good" means something similar to "sizable" or "significant," so "large" is a good alternative for this sentence. Ex: He took a good chunk of the crops we harvested today. Ex: He took a large chunk of the crops we harvested today.