What's your opinion?

[Randra]

Many years ago when I was young and dumb my builder and I installed a set of 906 heads on a 66 383. Which I discovered years later don't match. So I have decided to rebuild them and have them milled to increase compression. I removed the intake and saw there were cracks on the head near a center bolt hole for the intake. So now I am thinking of getting a different set. I was hoping that you guys would have an opinion on what would be the best combination with the camshaft that Was installed in it. Or even if this is a decent cam at all. I want a set that will work with my original intake and exhaust manifolds. This is just a driver so I don't want to go too crazy.I saw that aeroheads racing offers reasonably priced heads. But are they any good? I am on a strict budget as I am married with six children.


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Sorry pic is upside down.

 

[Mebsuta]

How does it run with that camshaft? You don't like it?

Everyone will probably look at the numbers and say you need a bigger camshaft, but depending on your car and how you drive, it might be great for cruising around, running errands and hauling kids. It probably makes good manifold vacuum and low-end torque.

I think vintage 66 heads will be closed-chamber, which will raise compression a little, but will have a smaller exhaust valve than the 906. If your motor has been rebuilt, depending on the compression height of the pistons that were used, you may not want a closed-chamber head.

All the factory heads, from 906 casting and later, are all about the same. 452 casting supposedly had hardened seats for unleaded. There may not be anything to gain from changing unless you need the vintage set that goes with the year of your car.

Is that combination you have just not getting with it?

 

[Randra]

Car runs well. But it's more of a noisemaker than anything. The problem is the valves are burnt from running unleaded fuel. So I need to have them done but in the process I found cracks in the head. The other problem is that I have open chamber heads on a closed chamber engine. Which of course lowers the compression ratio.

 

[terzmo]

I have 452's on mine....hardened seats..mild cam....RPM performer intake...lights the tires real easy

 

[HT413]

When you and the engine builder out those heads on, did you rebuild the motor too? How far in the hole are the pistons? Reason I ask is maybe the heads are a better match than you think? If it were me, I'd be looking for a nice set of done heads off a running motor that you could have a machinist go through.

 

[mopar 3 B]

There is nothing wrong with running 906 heads on 383 regardless of what year the block is. It is the components in the block that make the difference. Personally with the intake and exhaust manifolds you are running going to much a larger cam would be a waste of money and time.

 

[A383Wing]

I'm running open chamber heads on both my 383's...no issues