Competing at Rally Wairarapa, in the second of five rounds, Gilmour, of Dunedin, has her sights on overtaking surprise national series leader Alex Kelsey, while McCrostie is only 12 points adrift of historic class leader Marcus van Klink, of Kaiapoi.
At the season-opening Rally of Whangarei earlier this month, Gilmour created history as the first woman to win a leg of a NZRC round on day one, before a puncture on day two dashed her hopes of an outright round win.
"There is definitely a sense of unfinished business heading for the Wairarapa. I was really pleased with my pace in Whangarei, and with a couple of suspension and engine tweaks since then, the aim will be to go faster again this weekend."
McCrostie, of Kaitangata, was hoping a new dog box transmission, ordered months ago, would have arrived but it will not available in time for the rally.
Although he does have another back-up, he was disappointed not to be able to replace the standard gearbox he had to make do with at Rally Whangarei.
"It will blow. It's just a matter of when. If we can sneak through this weekend and see if we can get some more points on the board, that will be good."
Gilmour has been seeded in the "ideal position" of fourth for the Masterton-based event, behind Kelsey driving an open class Subaru, defending champion Richard Mason, and former champion Chris West.
With both Mason and West pulling out of day one at Rally Whangarei with mechanical issues, they will be focused on making up for lost points.
Also challenging for the outright rally win will be some-time Alexandra resident Andrew Hawkeswood, in his crowd-pleasing Group B Audi Quattro S1 replica and Rally Xtreme entrants Geof Argyle and Dean Sumner.
Not having to lead out the field as gravel sweeper and after a successful debut with her new co-driver Anthony McLoughlin at Whangarei, Gilmour's confidence was high.
"It is always a bit of step into the unknown with a new co-driver, but we combined really well in the car first time out. He is very thorough and professional in his approach, and delivers the pace notes really well."
McCrostie was also happy after his first-time pairing with Gore co-driver Andrew Graves and hopes for another strong result after Wairarapa's 16 special stages.
