So the most fuelful build I could actually spec up is this
Cutter which can do the course in 16.19T. The A7 FSD will actually shift up to 3150T at a cost of 19.1T of fuel but there's no achievable build I could find that attains that bulk. With a top speed of 201m/s boosting up to 321m/s, the Cutter won't put itself in a position to win a tiebreaker without sacrificing some of that mass.
For the racer on a budget how about this
Anaconda which can burn through 12.09T at a sedate 183m/s with regular boosts to 244m/s?
Regardless of how the tiebreaker is decided, an Orca is theoretically likely to be in the best position to win it.
This build can achieve 323m/s with a boost speed of 409m/s while guzzling 7.674T of fuel and
this one can complete the course at 348m/s boosting to 441m/s with a mere 104
g of fuel remaining.