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Old 01-01-2006, 04:36 PM
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ford 351C aussie heads?

Hi Guys,
I was thinking of changing the 351c engine in my 57 bird to a Lincoln dohc 4.6 mod motor, but it looks too complex. I have decided to stick to the 351c engine and make some mods.
I have a AODE trans and stand alone computer, 3.89 rear posi that will go behind the stock 351c 4v engine.
I have been reading that the 351c austrailian heads have the smaller 2v ports and closed combustion chamber design which should make a good street combo.
My ques. Do the aussie heads have hardened valve seats? Do the heads directly bolt on, including intake and exhaust manifolds?
I further plan on running an edelbrock performer intake and edelbrock 600 carb with a Pertronics electronic Ignitor II conversion and coil. I`m hoping this will make a nice street combo with good throttle response, gearing and overdrive. What do you think? Thanx for any help, Bob Myers, SD.

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Old 01-04-2006, 11:03 PM
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Quote:
Originally Posted by bob myers
Hi Guys,
I was thinking of changing the 351c engine in my 57 bird to a Lincoln dohc 4.6 mod motor, but it looks too complex. I have decided to stick to the 351c engine and make some mods.
I have a AODE trans and stand alone computer, 3.89 rear posi that will go behind the stock 351c 4v engine.
I have been reading that the 351c austrailian heads have the smaller 2v ports and closed combustion chamber design which should make a good street combo.
My ques. Do the aussie heads have hardened valve seats? Do the heads directly bolt on, including intake and exhaust manifolds?
I further plan on running an edelbrock performer intake and edelbrock 600 carb with a Pertronics electronic Ignitor II conversion and coil. I`m hoping this will make a nice street combo with good throttle response, gearing and overdrive. What do you think? Thanx for any help, Bob Myers, SD.
You have the 4v stuff now? I wouldn't change that stuff out. The ausie 2v are a step down from what you have now. Thats just my own opinion.

The intake for sure won't work, as the ausie 2v and our 2v ports are same, it won't be hard to get a replacement. I'm not sure about the hot end, but at least it goin into a bigger pipe, it should work.

Anyways, a bump for ya.
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Old 01-05-2006, 05:30 AM
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Bad bad bad closed chamber 2v's. The last pass car cleveland Fird installed here was in 85, we got unleaded in 86 - need I go on?
In the 90's a lot of 302c (closed chamber) heads got fitted to propane fueled clevo's here, bad, take out 6 cc's to drop the comp to 10.7, and the exhaust flow was awful - like they're good to start with. If you're going 2v for torque, use a 351c open chamber with a GENTLE dome. Good luck.
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Old 01-05-2006, 08:02 AM
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from my experience with a cleveland 4v, the only benefit the e-brock performer manifold gives is a weight savings over a stock manifold. do a little research for the right parts to wake up your "C". the aussie 2v heads are over priced for what they will do & your 4v heads are the best flowing factory heads ever made. just my .02

if you want to get some 1st hand street & strip info on clevelands,there are some "C" fans on www.Mustangsandmore.com
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Old 01-08-2006, 03:27 PM
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Quote:
Originally Posted by bob myers
Hi Guys,

the stock 351c 4v engine.
I have been reading that the 351c austrailian heads have the smaller 2v ports and closed combustion chamber design which should make a good street combo.

will make a nice street combo with good throttle response, gearing and overdrive.

What do you think? Thanx for any help, Bob Myers, SD.

IMO, (that's what this is all about huh?)

If your stock C 4bbl engine is ok with the fuel octane now, the Aussie heads will not raise your compression further, and they will maintain the detonation resistent chamber quench that is lost when going to the open chamber 2 bbl C/M heads.

The Aussie/American 2bbl smaller head ports will be beneficial for low and mid range power. Overdrive makes lower end power and response more of necessity. As I remember, the stock 4bbl C did not like anything below 3000 rpm. 2 years ago I was around a Ranchero that had a stock C 4bbl and it was a sick hog until it got wound up a little.

This head stuff pertains:

http://www.mustangandfords.com/techa...88/index5.html

http://www.mustangandfords.com/techarticles/30220/

http://www.mustangandfords.com/techa...288/index.html

http://www.network54.com/Forum/119419/

The 4 bbl heads come into "their own" with 408 cubes.

Consider that today there are substantially better cams profiles available which should make quite a difference.

Years ago there were "port plates" that could be installed in the 4 bbl heads to decrease the port size in the 4 bbl heads with substantial torque improvements.

Last edited by xntrik; 01-08-2006 at 03:35 PM.
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Old 01-09-2006, 10:15 PM
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ford 351c aussie heads

Hi Guys,
Thanx to all who replied and shared their opinions. I believe I will stick with my 351c 4 barrel heads and improve the ignition, ignition timing, carb setup and fine tuning. I still believe with a 3.89 rear gear and a 2.65 first gear in the aode trans I will have a very peppy, streetable combo. My think is, the revs will come up quickly with the lower gear and help offset the poor throttle response of the huge intake ports on these heads. I`m not trying to build a drag setup, just a fun more responsive combo.
My engine now starts great and runs smoothly, it`s just lazy on the throttle until the revs build. Keep in mind I now have a C6 trans with a 3.00 rear gear. Again, thanx, Bob Myers.
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