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403 to 400 swap

Posted By: 79fireterd On: 01-04-2008 @ 19:51:22         Reply | Edit
I have a 1979 trans am and would like to put my 1973 400 in it. The car had a 403 in it.

Are the motor mounts the same?
Posted By: davidr On: 09-07-2007 @ 22:38:31     Reply | Top | Edit
It will fit .
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95 Z28 purchased new . c.a.i. trick flow elbow ,58mm t-body and ported manifold . hypertech power program , crane springs and crane gold 1.6 rollers . 3 inch exhaust no cat , bbk headers and MSD wires and Iridium plugs . Also an Edelbrock 3 point strut tower brace .
Posted By: littlegto16 On: 09-08-2007 @ 00:56:43     Reply | Top | Edit
403 is an Oldsmobile engine. I assume your 400 is a Pontiac engine which will not bolt up to the Olds motor mounts. You will need mounts from a Pontiac powered car.
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Posted By: 79fireterd On: 09-09-2007 @ 12:19:33     Reply | Top | Edit
I know the mounts themselves are the same, because I ordered mounts for a pontiac engine, and they are the same as the ones in the car. Is the location the same?
Posted By: 79fireterd On: 12-02-2007 @ 11:02:43     Reply | Top | Edit
motor and trans are in the car, The pontiac engine bolted right up to where the olds engine was. Easier than I thought it was gonna be.
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