I have read a lot of people using the 390cfm 4-barrel carburetors on the 292.
I went a different route ended up using a modified 750cfm on a mildly built 292. - modified from a 4-barrel to a 3-barrel essentially. Fuel flow blocked from one main primary (with butterfly of primary blocked off from air flow), this brings the carb down to ~560cfm, and allows the one primary to open a little more at lower RPM for supposedly better air velocity.
My 292 has larger valves, lump ports, head decked, .30 bored, new cam.
Hasn't been road tested, only run for break in, but runs very well.
I'm not sure on that aussie intake (they look real nice, and I thought about getting one, but wanted water heat/cooling to the intake) so I went with Clifford. Supposedly Offenhauser intake is better for low end torque and clifford for higher end HP.
12bolt has a lot of good info on this, as well as Leo Santucci (two published books/power manuals I highly recommend)
