403 Pontiac

K

kingsley coach

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Had a call from a guy who says he has just removed a Pontiac 403 engine
...and did I want to buy it ?

What did Pontiac put a 403 in as I thought they were only 400 people and if
that is the case, aside from the intake and oil pan, would a Pontiac 403
bolt to the 425 ?

I'm pulling a blank on this one...help!

Mike in NS

--
Michael Beaton
1977 Kingsley 26-11
1977 Eleganza II 26-3
Antigonish, NS

Life is too short to hold a grudge; slash some tires and call it even !
 
https://www.google.com/search?q=Pontiac+403+engine

Should bolt on but no telling what else you'll run into with accessories.
I'd never do that to a GMC.

bdub

-----Original Message-----
From: Gmclist On Behalf Of Kingsley Coach
Sent: Tuesday, September 20, 2016 3:33

Had a call from a guy who says he has just removed a Pontiac 403 engine
...and did I want to buy it ?

What did Pontiac put a 403 in as I thought they were only 400 people and if
that is the case, aside from the intake and oil pan, would a Pontiac 403
bolt to the 425 ?

I'm pulling a blank on this one...help!
 
Supposedly, both Buick and Pontiac used the Oldsmobile produces 403 CID engine at times. So, it should be the same basic unit as what was used in
late GMC motorghomes. As bDub points out though what's hung on it is likely very different from what's in a coach. If you could find a lunched 403
out of a GMC to steal parts and brackets, it might be a worthwhile thing. I think I'd rather find a good core and build a 455 though.

--johnny
--
'76 23' transmode Norris upfit, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.

"Sometimes I wonder what tomorrow's gonna bring when I think about my dirty life and times" --Warren Zevon
 
Please someone make me an offer for this beautiful 403 sitting in my garage instead of pulling somebody's coach around. It has all the brackets, will
bolt right in, comes with a warranty and did I mention it looks real good?
Listed on the Swap meet at my cost - make me an offer!

Jeff
--
1973/94 GMCII Manny 6.5 TD AL radiator 1 ton front 4 bags back, Huber TBs
 
Uh, this is a Joe Mondello motor, or a build from Mondello Performance on the Left Coast? There's a difference. There's also a bunch of stuff that
would be real nice in a 442 or a TransAM, but which is kinda overkill for a coach. Find someone who lunched the mill in his Hurst/Olds 442 and do
binniss with him.

--johnny
--
'76 23' transmode Norris upfit, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.

"Sometimes I wonder what tomorrow's gonna bring when I think about my dirty life and times" --Warren Zevon
 
As indicated in the Swap Meet post it is Mondello Performance. As you know we lost Joe a few years ago so there really is no such thing anymore as a
Joe Mondello engine. That said, this engine was built, run under 1000 miles, went back to Paso Robles and had the top end redone, then to my garage.
It is built specifically for the GMCMH, but if I cannot find a home for it in the community I will either by another MH in need of an engine, or find
a '78-79 TransAM project. It's killing me to have it just sitting.

Jeff
--
1973/94 GMCII Manny 6.5 TD AL radiator 1 ton front 4 bags back, Huber TBs
 
Pass.

--johnny
--
'76 23' transmode Norris upfit, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.

"Sometimes I wonder what tomorrow's gonna bring when I think about my dirty life and times" --Warren Zevon
 
> What did Pontiac put a 403 in as I thought they were only 400 people and if
> that is the case, aside from the intake and oil pan, would a Pontiac 403
> bolt to the 425 ?

Olds made the only GM "403". It was only produced from '77-'79 and was installed in numerous California emission vehicles. In the rest of the
country it was commonly found in Buick Park Avenues, olds 98 and Toronado, but most commonly in '79 Trans Ams. Nearly 100k Trans Ams were made with
403s. Intake, exhaust and oil pan and accessory mounting is about the only difference to the MH version.
And yes it will bolt up to a THM425

--
Chris Geils - Twin Cities
1978 26' Kingsley w/ very few mods; Headers, Progressive Dynamics 9040, aux trans cooler, one repaint in stock colors, R134a, Al rad, 49k mi
 
Tks Chris....you seem to know your 'stuff' !

Mike

On Wed, Sep 21, 2016 at 8:12 PM, Chris Geils
wrote:

> > What did Pontiac put a 403 in as I thought they were only 400 people and
> if
> > that is the case, aside from the intake and oil pan, would a Pontiac 403
> > bolt to the 425 ?
>
>
> Olds made the only GM "403". It was only produced from '77-'79 and was
> installed in numerous California emission vehicles. In the rest of the
> country it was commonly found in Buick Park Avenues, olds 98 and Toronado,
> but most commonly in '79 Trans Ams. Nearly 100k Trans Ams were made with
> 403s. Intake, exhaust and oil pan and accessory mounting is about the
> only difference to the MH version.
> And yes it will bolt up to a THM425
>
> --
> Chris Geils - Twin Cities
> 1978 26' Kingsley w/ very few mods; Headers, Progressive Dynamics 9040,
> aux trans cooler, one repaint in stock colors, R134a, Al rad, 49k mi
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>

--
Michael Beaton
1977 Kingsley 26-11
1977 Eleganza II 26-3
Antigonish, NS

Life is too short to hold a grudge; slash some tires and call it even !
 
A huge number of Olds 403s went into 2nd gen Trans Ams. The hood would say 6.6 Litre. The ones that got Pontiac 400s said T/A 6.6. They are both good.
The Olds had a milder emissions cam and hence the Pontiac is sought out.
--
John Lebetski
Woodstock, IL
77 Eleganza II
Source America First
 
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