Re: [FWDLK] INTERCHANGEABLE HEADS AND INTAKE MANIFOLD

[Eastern Sierra Adjustment Svc <esierraadj@xxxxxxxxxxx>]

That would be a pretty neat trick; fitting the 55-56 Dodge Hemi heads 
onto the
55-56 Ply Poly (non-Fury) heads.

One major problem might be that the Dodge heads, along with The Ply's
pistons' "negative stroke" (?, maybe, where the pistons' overall height 
places
their tops at a plane below that of the block's deck surface).....would 
create a
decreased compression ratio, due to the Hemi's combustion chamber's 
extra volume.

This is precisely what occurs when 57 Dodge Hemi heads are placed
onto a Dodge Poly engine block, as the Hemi pistons are taller, and require
valve reliefs to be located onto the piston-tops.

Of course, taller pistons' installation takes care of any initial c.r. 
decrease.

Neil Vedder






Bjwt56@xxxxxxx wrote:
> Ron:
>
>      The 55-56 Dodge Hemi heads will fit only the 55-56 Dodge and 
> Plymouth V8's according to my parts book.  Part number is 1615886.  
> Incidentally, 1615886 will not fit the 56 Fury according to the same 
> book.  The 56 Fury head part number is 1731609.
>
>      John
>
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