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So, every weapon has it's limits. Current state of the art for US in bunker busting is the GBU-57, in the news lately. Reportedly it is being replaced by a more advanced/accurate munition in the works, powered and able to hit a target within 2.8meters? I wonder if or why not a 2-stage solution...

Let’s hope this isn’t a legendary failure lol I did watch their videos though … Wish me luck…..

TTI headers fit nice. Haven't used Dougs, but hear good things about them. I would avoid the Hooker 2" primary headers, but the 1-7/8" are OK. Been a long time (1990's) since I tryed some of the cheaper brands, like Blackjack and Headman, because of low quality.

should be fine. Sonic check the bores will give you more information.

Manifolds are fool proof and low maintenance, and the 73's will fit.

I have one .060 that's been together for 30 years. Works great!

This looks like a John Petrie paint scheme. John raced and hosted Performance Clinics for Chrysler Canada.

Wow...that is quite a "Needle in the Haystack" wish..but stranger things have happened. I would just try to get a 1970 "440" and be happy with that. Good luck sir!

Thanks Tom...yeah, something to consider for certain!

Yup, good info haywire 440...Thanks! :thumbsup:

The good one was also pressure tested and passed.

Thanks J...going to the shop in Hesperia CA this weekend (hopefully) Pettis engineering...have them Sonic check and magna flux etc. So...as I have always heard "too thin" on the walls and overheating etc. I will debunk that . Thanks

Why not sonic check it? Come to think of it I haven’t see any discussion on that test in a long time. I had 3 440 blocks checked years ago and one was good, the other 2 needed sleeves. They all are in dry storage.

Thanks on this...

Worst thing is you sleeve it. If it sonic tests great roll with it. I’m getting ready for 60 over on my 383 that tested good and core shift was minimal.

In my opinion a .060" over block makes a better race block than a street block for this reason. Depending on how thick the cylinder walls are once you start boring things out a lot the walls get thin and they can vibrate. This causes water to not make contact with the cylinder walls and causes...

A thorough sonic test is the most definitive answer on an individual basis IMO. That being said, at this point, I would have no qualms proceeding in your application/situation.

People have been doing that for 60 years.

Any thought on practicality/feasibility of doing a 440 .060 over bore? Is it a viable option? I have a 440 block already machined to .060 over bore and was wondering if the block can hold up under normal driving conditions, not "Racing". Essentially a "good street motor". Using cast...