You are called 21K to win 59K, so you are putting in 21/80 = 26% of the money. You are 26% against a straight. So I think you have to call here, regardless of read.
http://twodimes.net/h/?z=3654298
pokenum -h 8d 8h - ac 9c -- jd th 8c 7c
Holdem Hi: 44 enumerated boards containing 8c 7c Jd Th
cards win %win lose %lose tie %tie EV
8d 8h 10 22.73 31 70.45 3 6.82 0.261
Ac 9c 31 70.45 10 22.73 3 6.82 0.739