Re: [FWDLK] Manifoldly speaking...

[Dave Homstad <dhomstad@xxxxxxxxxxx>]

The simple answer is that Dodge Hemi heads have round exhaust ports and Poly heads have square ports. The bolt patterns are different. Intake manifolds are interchangeable.

Dave Homstad
 56 Dodge D500

>
> From: eastern sierra Adj Services <esierraadj@xxxxxxxxx>
> Date: 2004/11/14 Sun AM 02:16:54 GMT
> To: L-FORWARDLOOK@xxxxxxxxxxxxx
> Subject: [FWDLK] Manifoldly speaking...
>
> JFG (just for grins), I opened my parts book, & the Good Book says that
> the correct left side exhaust manifold for the venerable  325 c.i.
> engine block for 1956- 1958 (non-D500) should have a P/N of 1634 445.
>
> Tina's left side manifold has P/N 1634 446  which fits the 1956 - 1957
> D500 .
>
> There appear to be no less than 3 exhaust manifolds that will fit the 57
> -58 RIGHT side
> of the "325" engine block: 1532  891 (which 'originated' for the  1955
> V/8) 1737 791 (which debuted in 57, & also fits 1958 blocks) , and  1671
> 128 (which fits only 1957 A/C  cars;  1854
> 990 apparently fits the 1958 A/C cars).
>
> Interesting point:  I am aware that the exhaust manifold GASKETS , for
> the "KDS" (standard 1967 V/8 block) are different from the 1957 (&
> 1956?) D500 , engine blocks.
>
> I never stopped to consider WHY those gaskets would be
> completely-different in appearance, & now Tina  has confirmed that the
> engine blocks
> ARE  actually different, because the exhaust manifolds do not
> interchange, between KDS & D500 blocks.
>
> So, went  back to the G.B. & there it/they was/were!  The 1956 and 1957
> 'regular' and  D500 engine blocks (go try to ORDER one ;    all FOUR
> blocks) had different P/N's.
>
> I had always believed that the 57 D500 was essentially a Hemi-head  and
> 'carb-jetting'
> upgrade ; looks like the ENGINE, too, was 'better'!
>
> Neil Vedder
>
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