Kostecki himself is positive about the chance of such an idea coming off.
“I'm always looking forward to driving a race car, no matter the case of what category it's in,” he said.
“To have Richard here this weekend and Andrew Dickinson is really cool and we'd love to do a few [NASCAR] races next year.
“It's seeming like it's all going to come together, we'll just have to see what happens, but I'll just take it as it comes.
“I really enjoyed working with those guys this year at Indianapolis and we'll see what happens.”
Kostecki took 78-year-old Childress for a hot lap of the Adelaide Parklands Circuit in the Thursday afternoon ride session, before qualifying on provisional pole position 24 hours later.
“It was awesome to take Mr Childress for a hot lap,” said ‘Bush'.
“He hasn't been for a hot lap in 15, 20 years and he said he was never going to do one again and he told me that he was he was going to do one with me, which I was pretty stoked to find out [about].
“He enjoyed every minute of it and he told me as soon as we came back in, ‘If you drive like that tomorrow, you'll be fine.'
“So, it's fantastic to have those guys here all the way from America and to see how Supercars racing operates here in Australia, and they've loved every minute so far.”
Kostecki will join forces with RCR NASCAR drivers Kyle Busch and Austin Dillon in a World Racing League race next weekend at the Circuit of The Americas.
Before then, Practice 3 in Adelaide starts at 09:45 local time/10:15 AEDT.