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The simple answer is no. I have an 11.4 to 1. I use 87. To be fair, it has little in common with a 440.

Used to call the old chebby six a stump puller. Don't know what kind of head it had on it...rectangular I think.

So back to post one. I have been watching this for one reason. I have a 1974 440-4 engine. I also have in my possession almost every head made for the 383 and 440 in the last 50 years or so, including a set of closed chamber heads I was running on a '66 383 that performed well. On a stock...

I always figure hp=rpm x torque. So a time thing. How fast can you spin all that force.

You need to fix it right away, but there are probably things you could do that don't require lifter replacement. Try Amsoil engine flush. I also will take the rocker covers off and use a hollow push rod to to squirt Gumout or similar directly into the lifter. Push gently on the pushrod a...

Could be anything. Maybe a valve just stuck a little for a moment.

I'm still thinking. One of the things I have done is go for broke and when it hits max speed let off the throttle in the hope that the bowls will fill up, then hit it again and see if a little more speed can be coaxed out of it. If so it could be a fuel prob, but if you are getting serious...

I should have been more specific. What I was trying to determine was if the engine was capable of its full RPM range in first and second (or even third if it's a 4-speed).

Will it wind up in the lower gears?

The Challenger is a '70 440 and a 14 isn't all that bad for a '72 four door door slammer. Puts it right in there with a oh say '69 Z.

Like my buddy told me a long time ago. There are some nasty 318's running arround out there.http://www.youtube.com/watch?v=-n0M8BQzW3g