Pump gas 440 advice

[Dusty997]

With a 516 or 915 closed chamber head, quench is possible.
With a stock 69 906, with its completely open chamber, the is NO QUENCH, NONE, unless aftermarket quench reverse dome pistons are installed (or the heads milled about .125!)
I believe the o.p. is anticipating problems. He might not have any. It kinda depends on the quality of fuel available in his area. If he had to run California Cat cat piss 15% he might have problems. 93 available where he is? Probably not a problem.

Your correct. Just trying to stay ahead of any potential issues based on stuff ive read. I might be swapping to aluminum heads too. Not totally sure yet. Taking all winter to do my research before i touch anything.

 

[BSB67]

I'm picking up a bone stock all original 1969 Chrysler 440 motor tomorrow that is advertised as a 10:1 compression.

Curious as to how you know this? It’s 56 years old.

 

[Dusty997]

Curious as to how you know this? It’s 5original own

Curious as to how you know this? It’s 56 years old.

got it from the original owner, came out of a 55,000 miles car.

 

[BSB67]

got it from the original owner, came out of a 55,000 miles car.

So he’s 80, and the motor probably sat for 40 years, assuming he drove it 3,500 mi/yr for 17 years. Wonder how it was stored. Anything is possible.

 

[69conv]

If u do the aluminum heads you will also solve the leaded gas problem. Back in the day we had leaded gas, today no lead means the exhaust valves run hotter and will recede into the head or even burn. Later engines used hardened valves to solve this problem, and modern aluminum heads do also. I did stealth heads from 440 source and am very happy with them. store.440source.com

 

[Dusty997]

If u do the aluminum heads you will also solve the leaded gas problem. Back in the day we had leaded gas, today no lead means the exhaust valves run hotter and will recede into the head or even burn. Later engines used hardened valves to solve this problem, and modern aluminum heads do also. I did stealth heads from 440 source and am very happy with them. store.440source.com

those are the heads i was looking at

 

[69conv]

They used to have cheesy locks but they upgraded. My 400 dyno with those heads.