Reply to "Aussie vs. 4V Cleveland Heads"

Since nobody has answered yet, I'll tell you what I can. While I have both, I haven't yet mounted my Aussie 2-V's, but have researched them a lot and built them already. Everything I have read and heard says they're MUCH more torquey for street. Technically, you could use a 4-V intake, but the Weiand Xcelerator (2-V) single plane is probably one of the best. Technically, you could use 4-V headers, but they won't scavenge as well (Larry Stock's 2-V Hedmans come highly recommended). I suspect they don't flow as well at very high RPMs, but your intake and/or valve springs, etc. may also be limiting factors there. Should all be good thru at least 6500 if built well. Err on the side of flat pistons, even hypereutectics, 10-11 C.R. There's a good web site on the differences; I'll try to remember to e-mail it to you when I find it. A guy I'm considering for some port work built & ported Aussies for a GT-40 & said they're "the best." Probably not for sustained 8000s, though. Good luck.