It's a 1964 Oldsmobile 394 motor .
The 421 emblem on the fender is from a Pontiac . No idea why anyone would put it there .
If you post a pic of the engine serial number , I can tell you exactly which model it is .
The number is stamped on the left cylinder head above the center exhaust port . Like this ;

 

What a hoot! Oops sorry I see you are seriously looking to find what size engine is in the remains of that car, looks like you have gotten the answer. Anyway at first I thought this post was a joke....

 

i think ur talking this number ill clean tomorrow its dark here

 

That engine number decodes to a 1963 Starfire motor ( 345 horsepower ) .
Although the car is clearly a 1964 . It was probably swapped in to replace a failed original .
BTW the air cleaner is a 1964 .

Does the engine turn with a breaker bar and socket ?

 

haha no worries reason i ask im not to familiar to oldsmobile i want to see if this engine would fit on a 1964 impala xframe

 

it turns by hand pulling on the belt this car was running last year or so

 

Not without a whole lot of aggravation and fabrication.

394 has a motor mount at the front, under the timing cover. Then two at the back corners of the engine on the car's transmission support. Exactly backwards from the way the Chevrolet engine mounts.

Doubt there's enough clearance for the LH exhaust manifold where the Chevy frame narrows down for the X. Might get into some really weird bends. Any headers would have to be custom bent.

 

This car needs to be restored to its former glory!

 

🙂

 

Not on my dime I wouldn't. Someone needs to pull the engine for parts maybe..... Tedd