455 vs. 500 cid

L

larry dtimothy

New member
Jun 21, 1998
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500 cad is a direct replacement and will fit perfectly. Many GMCers
have used it.

Thank You Thomas,
This was good news for me to wake up to!
Now My chore will be to weigh the Pros and Cons of the swap. Have You
any thoughts regarding 455 vs. 500?
Tim
 
I love the 455 and think it is a stronger engine especially if you have one
with a steel crank and HP heads. I would keep the cad as a spare.

>500 cad is a direct replacement and will fit perfectly. Many GMCers
>have used it.
>
>Thank You Thomas,
>This was good news for me to wake up to!
>Now My chore will be to weigh the Pros and Cons of the swap. Have You
>any thoughts regarding 455 vs. 500?
>Tim
>
>
 
68-70 with engine codes F,F0,F00,F1 and F2 has steel cranks
70-76 455 cylinder heads with codes K,J,G and C.

>Which ones have the steel crank & HP heads??? I have a '73.
>
>Lanier
>
>
 
68-70 with engine codes F,F0,F00,F1 and F2 has steel cranks
70-76 455 cylinder heads with codes K,J,G and C.

What is the advantage of a "steel" crank?
Of what material are the others?

Tim
 
Others are cast. steel crank is much stronger.

>68-70 with engine codes F,F0,F00,F1 and F2 has steel cranks
>70-76 455 cylinder heads with codes K,J,G and C.
>
>What is the advantage of a "steel" crank?
>Of what material are the others?
>
>Tim
>
>
 
Better breathing

>Other crankshafts are cast. steel crank is much stronger.
>
>Thanks again Tom, for the help here. I'm still hoping others will join
>in with their experience and opinions on the 500 vs 455.
>The second thing You mentioned was the heads. What is different about
>the HP (high performance???) heads.
>
>Tim
>
>
 
Other crankshafts are cast. steel crank is much stronger.

Thanks again Tom, for the help here. I'm still hoping others will join
in with their experience and opinions on the 500 vs 455.
The second thing You mentioned was the heads. What is different about
the HP (high performance???) heads.

Tim
 
Larry........If I remember correctly, the was an article in Motorhome
Marketplace by someone who did the swap. As I recall, it was difficult and
they weren't happy with the finished product. Check with the magazine and
they'll send you a copy of the article.........Jim Davis
- -----Original Message-----
From: LARRY DTIMOTHY
To: gmcmotorhome
Date: Sunday, July 19, 1998 1:28 PM
Subject: Re: GMC: 455 vs. 500 cid

>does anyone know of anywhere I might research the pros and cons of the
>caddy 500cid vs. the olds 455 engines?
>
 
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