360 11.5:1 pistons

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67/6barracuda

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Found a set of Mopar p4007042 forged pistons with a born on date of 88’ so far a quick search I found that they are .030 over 11.5:1 and heavy. Was wondering if anyone had used these gems, if so what where the particulars of your build?
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If the plan is to use OE open chamber heads, then fine......... but Probably won’t fit with most modern heads without reworking the dome.

11:1 can easily be achieved with TF heads and flat tops.

No chunky dome, no heavy old piston, modern chamber.
 
Rumblefish I think your right I read something like direction connection reboxed them and charged a few hundred dollars more for em’ true capitalists.
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That was the one single biggest draw back and sales inhibitor of what was otherwise an excellent corporation backed racing part supply effort. MoPar had some of the best equipment and designs of there own parts. The hefty price tag on some of the other parts was insane. I don’t understand over charging (and by a large margin at that!) the very people using and flag waving your product!
 
Like previously mentioned those are open chamber dome Pistons very strong and were the go-to race Pistons for many bracket racer and hot rod. But with an iron j or X had you're probably looking at a race gas build.
 
I have a couple sets of J’s and a set of 308’s. My CNC 190 junkmasters are not going to work with the closed chambered. I have a 91’ roller and a 71’ that are in need of building but I also have a set of speed pro hcp116 so I got to map out a couple builds.
 
Those are badass. Yeah "heavy" by today's comparison, but how many millions were used? They work good.
 
Yes I can remember some guys being able to run those on pump premium gas now that I think about it , but that was in the late '70s and gas was a lot better.
 
I have a couple sets of J’s and a set of 308’s. My CNC 190 junkmasters are not going to work with the closed chambered. I have a 91’ roller and a 71’ that are in need of building but I also have a set of speed pro hcp116 so I got to map out a couple builds.
Those HCP116 are good pistons. I have them in the wife’s 360 now.
The MP units are good with W2’s. The older W2’s were open chambered.
 
The W5 is a closed chamber offered in 59 & 51 cc’s. muse of the domed slugs is a no go.
What W5 intake?
It’s easy to mod for a standard head.
 
The W5 is a closed chamber offered in 59 & 51 cc’s. muse of the domed slugs is a no go.
What W5 intake?
It’s easy to mod for a standard head.


You can use those pistons with W5 heads. You have to mill the quench pad down .018-.020 and they work.
 
I think so
Then it’s this one below, correct?
5FB83DB2-8E24-4FE0-A7F2-C663C321AC14.jpeg

You can use those pistons with W5 heads. You have to mill the quench pad down .018-.020 and they work.
The dome fits? I have smaller some slugs that barley squeak in. I do not see that dome fitting. I’ve also not held them in my hand ether.

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9DD7A22C-2236-47B8-8B51-55873D4AB8A5.jpeg
 
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