440 6 pack
 

Putting together a stocker bottom end and I have 3 blocks to choose from.
The best block checks out with a minimum of .171 cylinder wall thickness. Before machine work is done.
My pistons are .060 over.
The question I have is, would you fill the block or sleeve all eight cylinders?
I've had someone tell me do not fill the blocks you will lose ring seal.

Re: 440 6 pack
 

The reason to fill blocks is to preserve ring seal. Increases rigidity. Fill as high as possible leaving 1-1/2" at the top.

Re: 440 6 pack
 

We always ran filled blocks never had any problems with ring seal but i never had a mopar if that makes any difference.


Jerry
Retired 3490 3492 STK SS SST

Re: 440 6 pack
 

Is .171 on thrust side of cylinder.
That is the most significant spot.

Re: 440 6 pack
 

Yes on the thrust side towards the bottom.

Re: 440 6 pack
 

I would rather see it on the bottom than the top
for the thinner side.

My big blocks are thicker than that by .030/.040.

I think you would be fine with a filled block at that dimension.

Sometimes my filled blocks leaked better after they had been
reringed once....But they were still decent the first time.

Re: 440 6 pack
 

Does anyone know if it is legal to put 4 bolt main cap in?
The type I'm looking at bolt through the side of the block.

Re: 440 6 pack
 

Nope!

Really not needed in a Mopar 440 at this
power level in my opinion.