Assuming you're right about the hand in question,
http://twodimes.net/h/?z=8232355
pokenum -mc 500000 -7s8 ts qh td 8s 8h - ks kh as 9d 4s
7-card Stud Hi/Low 8-or-better: 500000 sampled outcomes
cards scoop HIwin HIlos HItie LOwin LOlos LOtie EV
Ts 8s Td Qh 8h 286530 286530 213470 0 0 0 0 0.573
As Ks 4s 9d Kh 213470 213470 286530 0 0 0 0 0.427
Seems like a pretty easy calldown.