50% of net offered from OWNER OPERATOR To drive his truck?

Hello
I have never driven for a 50/50 split of net? Owner says he covers repairs/ unless i cause damages which seems fair to me, so after fuel and broker fees/ dispatch is this a good deal? I like mileage pay I know how many miles to drive to get what pay and I am greedy, so the more miles the more money! but it seems i could end up driving a lot of mile and get paid less! Its a run from Atlanta to Dallas,Texas (I-10,I-20) NO FARTHER THAN I-35 and back to Atlanta!
He says he can gross from 2200 to 2400 a week and sometimes 2800-3200 a week? I use to run that for someone else and at .50 a mile i made 390.50 a run! and could do 3-4 runs a week ! 3 runs if I wanted to be home on that weekend! i hate percentage pay thats why I never took those type of driving jobs, it just always seemed as if you would be doing some driving for free! He also said he had been paying some drivers a 60/40 split of gross? which is better? Since i have no idea what the gross of each load is its hard for me figure if either way is best, except i guess 60/40 then i would be getting off the top before any of his other operating cost comes out! it seems by the mile is more clear cut but I know this way is better for him because it whats he wants to use thats business everywhere not just trucking when you work for some else! What's a hand to do? Thanks and GOD Bless

 

Thanks something just dont fell right to me! I love the run from to Atlanta to Dallas but this seems odd