'63 LeSabre with a 425?

Bought this LeSabre that the PO had installed the buckets and console out of a Wildcat in. He reportedly installed the 425 from the Wildcat as well. New guy to Buicks, wondering how one discerns the 425 from the 401. Thanks, Hunter

 

you can ID a 425 by the two letter code stamped on the top of the block right in front of the lifter valley cover. If it's a 425 generally the last letter will be a X or W

Here's a link to the codes - they're not always the easiest to read, you might have to scrape some paint.....


http://transmissionadapters.com/buick_casting_number_id_chart.htm


Good luck! Post pics, sounds like a cool combination....

 

Bigpig455 THANX for the speedy reply. Got some under-the-hood scouting to do. Hunter

 

A '63 LeSabre would have originally come with a low compression 401 2bbl. carb.