your scores are not bad.
Why did you choose 13 vs 7 to begin with?
Unless you just really can't afford the payments or don't want to afford the payments for the next 4-5 years whatever your plan states, I would not go back now and convert to 7.
The main reason I would not convert now is because chapter 13 is reported on your credit report for 10 years not. if you go back and file 7, now you will have chapter 13 and chapter 7 bk showing on your credit report for 7 years and you will take another slug to your credit score when you come through the 7.