4th st razz question

[blumpkin]

Instinct says that a call could be right here, but...?

*** 3rd STREET ***
Dealt to xblumpkin [Ad 7c 5d]
Dealt to VipSelect [6s]
Dealt to StorPike [Ah]
Dealt to xthesteinx [8c]
Dealt to buzzard1881 [Kh]
buzzard1881: brings in for $10
xblumpkin: raises $20 to $30
VipSelect: folds
StorPike: folds
xthesteinx: calls $30
buzzard1881: folds
*** 4th STREET ***
Dealt to xblumpkin [Ad 7c 5d] [Ts]
Dealt to xthesteinx [8c] [9c]
xthesteinx: bets $30
xblumpkin: ?

[HOWMANY]

I was surprised to discover that if he has perfect hole cards here then he is 56:44 favorite.

I assume this is because 5th street can very easily fall in such a way as to put you in a happy place and him heading for equity whitewater with his 98 draw against your 7 draw.