Bending the fork straight ? (more rake lowers trail)
Bigger gear ? You will throw away the chainguard too.
SRAM Dual drive rear wheel hub puts a 3 speed IGH in the cassette Hub, so the actual high gear is 25% higher, 4/3rds of the chainring/cog ratio.
the upgrade for each will cost more than Both purchases ..
save Money? Slow Down ! ... What's the Hurry?