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Premium Member
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4,705 Posts
Yes, It should not be a problem. Years a go I put a 455 in a 66 GTO, as I recall it was no issue. You may need to buy diffrent engine mounts. I can't remember. But no other mods were necessary....Eric
 

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64-67 Expert
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8,569 Posts
It will bolt right in. It is the exact same size externally as the 389. Nobody will know it's not a 389 unless you tell 'em! The mounts are the same. Good luck........
Jeff
 
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