Motion Replacement Engines

[vettebuilder]

Thanks for that info! So, did Motion stamp the pads on the engines or were they blank? I know bare replacement GM blocks were blank but short blocks had the CE and assembly date. Also, would Motion use a 512 block to build a 427 if the customer asked, or were they only used as 454? I see O much data on the internet about blocks and engines and stampings that I was curious as to who is correct and who isn't. I have no intentions of trying to duplicate any Motion car, I was just curious as to how the stamping and casting numbers went. I even read that Motion put their own stamps on some of the engines, so there is WAY more info out there than can possible be correct.

[smallblockhero]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: vettebuilder</div><div class="ubbcode-body">Thanks for that info! So, did Motion stamp the pads on the engines or were they blank? I know bare replacement GM blocks were blank but short blocks had the CE and assembly date. Also, would Motion use a 512 block to build a 427 if the customer asked, or were they only used as 454? I see O much data on the internet about blocks and engines and stampings that I was curious as to who is correct and who isn't. I have no intentions of trying to duplicate any Motion car, I was just curious as to how the stamping and casting numbers went. I even read that Motion put their own stamps on some of the engines, so there is WAY more info out there than can possible be correct. </div></div>


(correct me if im wrong here fellas)
Almost everything ive seen in writing shows that L-88's and other BB engines that were installed by MP were usually crate engines purchased from Chevrolet. ive never seen anything from joel or any other motion employee to imply that they stamped anything on any of the installed engines to designate it as their own. from the standard replacement BB up to nastiest of LS7 transplants that were installed, the literature available states they almost all started life as a replacement crate engine from GM. so whatever was on the stamp pad from tonawanda or flint should be all thats on them.

[dreemz]

A full Phase III 427 could be stamped with Motion Performance designation and a particular work order number.

[vettebuilder]

SO, back LONG ago when I was much younger I was thinking of purchasing a motor from Motion for my 1974 Corvette. I still have the old original Motion catalog and some original decals they sent. I managed to hold onto some of the the original Motion items I bought back then, like the Lemans gas cap, the fly eye air cleaner, Mallory super coil, and some valve covers. That was as far as my budget got me back then. When you ordered a Motion big block engine from the catalog, did Motion stamp it in any way to verify it was from them? I don't understand why people are saying that CE engines came from Motion while others say blank pad engines came from them, and even one person said they were stamped with MP. There seems to be a lot of questionable material about the engines, and I am still having difficulty sorting thru it.

[Hemicolt]

Can you post pictures of the Motion parts you have? [img]<<GRAEMLIN_URL>>/biggthumpup.gif[/img]

[vettebuilder]

I can, but I have to dig them out first. I bought them back in the mid 70's and they were packed away and went thru 3 house changes since!

[vettebuilder]

I found this old air cleaner in the box on top of some other things in the attic. The chrome is perfect, box is a bit rough, it was in a box with some old car parts stored for a hopeful rebuild someday. This one might hit ebay because I found 3 others in the same box, but they are not in the original Mr Gasket wrappers. I don't know how to upload pics to the site, so I have them on a photo bucket link.

http://s1172.photobucket.com/albums/...otion%20items/