GR translation: names of wheelhorses that will pay him off enough for a certain getaway

[Mike Jing]

V625.37-626.3   Crosses, swastikas, Zone-mandalas, how can they not speak
to Slothrop? He’s sat in Säure Bummer’s kitchen, the air streaming with kif
moirés, reading soup recipes and finding in every bone and cabbage leaf
paraphrases of himself . . . news flashes, names of wheelhorses that will
pay him off enough for a certain getaway . . . . He used to pick and shovel
at the spring roads of Berkshire, April afternoons he’s lost, “Chapter 81
work,” they called it, following the scraper that clears the winter’s
crystal attack-from-within, its white necropolizing . . .

Who are these "wheelhorses" exactly?  And whose "getaway" is it?  I assume
it's the wheelhorses'.  And I assume "certain" means "sure".
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