Piston swapping

[RAT ROD AL]

I have a question about some Std bore 340 pistons.
Will tese work in a bored 360 ?
Is the pin a different hight?
Whats the story ?
I have 2 new sets of Domed std pistons and trying to figure out what to do with them !!!

 

[RustyRatRod]

It depends on which ones they are. Tom Hoover did it back in the day when no pistons were available for the 360 and built the Hoover 360. If I remember right the Hoover recipe was a .040 over 360 block that used the lower compression 4 eyebrow 340 pistons. That got compression up to around 12:1. I don't think it would work with domed pistons.

 

[Professor Fate]

And IIRC, he had to cut a ton off the (low compression) piston tops just to get it down to 12:1 with the 360 crank.

 

[RustyRatRod]

And IIRC, he had to cut a ton off the (low compression) piston tops just to get it down to 12:1 with the 360 crank.

That sounds about right. Thanks.

 

[RustyRatRod]

And IIRC, he had to cut a ton off the (low compression) piston tops just to get it down to 12:1 with the 360 crank.

Running the math, I get .157" positive deck clearance using the 4 eyebrow 340 piston.

 

[RAT ROD AL]

 

[RustyRatRod]

You'd have to mill the domes SLAM off of um and "maybe" a little more. They might be thick enuff, though.

 

[RAT ROD AL]

Rob, can you use em in Vixon

 

[JDMopar]

There's no cheap way to use those in a 360 block. The easiest would be to get bearing spacers and put a 3.31 crank in a 360 block, bore it .040 and sock it together. You'd have to use open chamber heads though. Might be easier to see if The Smithsonian needs some ancient pistons....lol.

 

[RustyRatRod]

Rob, can you use em in Vixon

I don't think they'll QUITE fit. LOL

 

[Sterling]

The bottom of the pistons need to be milled too, they will hit the counterweights of the crank.

 

[RAT ROD AL]

Well I guessing these are pretty much a lost cause. Thanks guys.

 

[JDMopar]

Well I guessing these are pretty much a lost cause. Thanks guys.

Hang onto them.....somewhere, there's a dude with a new R or X block that is stuck in 1975 and looking for standard bore 12.5-1 pistons....lol. The bearing spacers would seriously work to put a 3.31 crank in a 360 block. Last I checked, they run around $400 for the spacers.

 

[MOPAROFFICIAL]

I have a question about some Std bore 340 pistons.
Will tese work in a bored 360 ?
Is the pin a different hight?
Whats the story ?
I have 2 new sets of Domed std pistons and trying to figure out what to do with them !!!

Surprise. Well you learn something new about somebody everyday.