Brand New 425 "X" motor found! Guys, I just bought this brand new 425 on ebay for my 34 coupe. I can't believe I was the only bidder. This is the eBay description... What can anyone tell me about the strange engine stampings? From this photo they seem to be... 64 X 425 - 76 Underneath that and upside down is the code W 72 Is that a 7 under the X? Anyway, here are some more shots. Hopefully it won't need too much to get it going and in my hot rod where it belongs. I welcome your comments on what I have here. I'll be ecstatic if it's just a good clean usable 401. But the bore has been checked and I've got pics coming of the square nub at the back of the block. It does say 425 on the engine number but that's weird as they don't normally say that and it's missing it's normal codes. A 64 425 should be coded KW or KX. If anyone can shed any light feel free to post a reply. P.S. Pre49.com is my hot rod forum. Very small.
Cool. Experimental. I like the sound of that. This begs the question; Is there anything different about these experiemental engines? Are they more desirable than a normal 425 for any reason?
I saw that one one ebay. Wish I could have bought it. A very good price for probably the ONLY new 425 in existence! Congratulations on the purchase. I told the wife that it's too bad I couldn't pick that up since buying an old one and rebuilding it would cost that much. As I recall, it was pick up only wasn't it? Cool buy though. Glad it's going in a cool ride!
I contacted him and he was really cool, said he's got a strapping machine and can load it onto a crate and deliver it to the transport depot for me. All I have to do is get it to Compton CA (my Australian shipping yard) and it's on it's way down to me.
I was just handed this link that goes some way to explaining the "X" motors. Scott Miller posted this http://www.v8buick.com/showthread.php?t=184705&highlight=experimental Interesting. Need more info though. By the way, please forgive me if this stuff has all been discussed before. I've been searching on here for a few hours now and either I'm using wrong search terms or the "X" motors are discussed deep down in a forum where I can't see it. Links to threads will be appreciated.
I does look a bit steeply angled but it's probably hard to tell from this angle and those exhaust manifolds are for a car. I don't have the engine yet.
Get Joe Taubitz on the Board ("the Old Guy") to ask Denny Manner about the engine. He still has the factory paperwork.
Ya, I agree, bet its a marine intake anyway.. I have NOS edelbrock marine exhaust manifolds , if you are interested.
Hopefully I will see Denny this weekend .I will ask him about your 425 . Nice score :beer :beer :beer
Here in the United States, there were a few manufacturers that made "utility" engines, and some were referred to as experimental. There were some few Buick Nailheads, more than a few 331/354/392 "industrial" Hemi's, lots of International Harvesters, all running things like giant water pumps for wells to irrigate large farm fields and other things. I am not saying that your engine is one of these, it more than likely is an experimental engine, jsut pointing out that there were more than the engines built only for cars in use, all over the place. I saw an ad in E-Bay a while ago, for a "low use 392 Hemi engine, complete". Seems it was attached to a siren, like an air raid siren, in a town that changed the siren to electronic, and didn't need the siren with Hemi any longer. If you ever travel through the American South West, look at the fields and especially, the water pumps, there are still more than a few industrial engines running pumps, and other things. Regards, Milton
Dual quad 425's had the letter "X" on the top of the block, instead of "W", indicating a standard, or single four barrel 425. Dual quads were an option for the Riviera as well as the Wildcat for 1964. Could the restamping be a production line error? If the block is experimental, what differences from "stock" have you found? Marty "D" cylinder heads "D" exhaust manifolds (2 different types) "X" code aluminum two four barrel intake manifold
I'm not sure I would know a difference even if I saw one Marty but the engine is still in the US. Unless someone can tell me otherwise I'm going to presume it's just an unused 425.
Very cool:bglasses: From the stampings, it doesn't appear to be an engine used for a production car, but rather intended for use at Buick. Maybe it was used by engineering for some purpose. :TU:
I see LW 72 stamped upsidedown on the valley pan rail. That could mean 65 425 4bbl at 10.25:1 compression. Cheryl
I checked that out wish I could have bought it I had a NOS 364 that was used for a front impact test. When I pulled the heads off there was blue paint on the pistons also someone used a black marker to number the pistons Also had yellow chalk marks on the crank witch I asom were put there after they torqued the main caps down. I have pix of it but no scanner so I cant post them. What up with your 34 is it real or glass? My dad has a real 34 roadster that getting a 322 with a 37 lasalle trans going to be built using only parts that were made before 1955 100% period correct Tom
