WI is not pro spousal support and with what he makes he's not likely to get it. It's usually only reserved for a situation where the party doesn't work and needs time to retrain for the work force. As for CS you may end up paying him something since you make more even with 50/50 but I sincerely doubt it will be 371 a month. I know my x paid me 2.7% of his income a month for 2 kids. It amounted to approx 90.00 a month, so you might be looking at a max of 200 or so. Now we make about the same amount so CS is a wash.
When we were together, you said you'd die for me. Now, I think it's time you kept your promise.