1972 cutlass supreme

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Sep 7, 2016 | 04:31 AM

Roberdc1

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Joined: Sep 2016

Posts: 3

1972 cutlass supreme

I have a 72 cutlass but I am switching the 350 for a 403. Does anyone know if the 350 manifolds will work on the 403? If not, any advise on this swap? Chrisroberts376@yahoo.com

Last edited by Roberdc1; Sep 7, 2016 at 04:32 AM. Reason: Adding email

Sep 7, 2016 | 05:14 AM

tru-blue 442

Old School Olds

Joined: Nov 2008

Posts: 9,270

From: Marble Falls TX

Welcome, Straight swap. The only difference that may delay you are on the exhaust manifolds where they exit. The flanges could be different where they bolt to the down pipes. Good luck with it.

Sep 7, 2016 | 07:40 AM

joe_padavano

Old(s) Fart

Joined: Mar 2007

Posts: 50,770

From: Northern VA

Quote:

Originally Posted by Roberdc1

I have a 72 cutlass but I am switching the 350 for a 403. Does anyone know if the 350 manifolds will work on the 403? If not, any advise on this swap? Chrisroberts376@yahoo.com

The 350 and 403 Olds motors are externally identical. Everything swaps. Bolt the 350 manifolds to the 403 and the car will never know the difference. Be sure to use the motor mounts for the car (2261s).

Sep 7, 2016 | 01:44 PM

Roberdc1

Thread Starter

Registered User

Joined: Sep 2016

Posts: 3

Quote:

Originally Posted by tru-blue 442

Welcome, Straight swap. The only difference that may delay you are on the exhaust manifolds where they exit. The flanges could be different where they bolt to the down pipes. Good luck with it.

Sep 7, 2016 | 01:55 PM

Roberdc1

Thread Starter

Registered User

Joined: Sep 2016

Posts: 3

Thanks for the advise guys. I dropped off the manifolds and they fit perfect!

Quote:

Originally Posted by Roberdc1

I have a 72 cutlass but I am switching the 350 for a 403. Does anyone know if the 350 manifolds will work on the 403? If not, any advise on this swap? Chrisroberts376@yahoo.com