for sure

[robert akers]

i have just got 4oo mblock c 6 trans came as apackage how to tell 400 from just looking outside only 8 bolts on head pans? intake is underneath head pands somewhat ?has diae 6015 a2c aboove the starter right side of motor? any ideas? thanks i do want to take pan off. robert akers

 

[Old Iron]

Look again, if the intake is under the valve covers I don't think it's a 400M
I'm not a Ford man so the possibility of me being wrong is high
Pics would be very helpful!!!

 

[23crate]

this may help ..

http://www.mustangtek.com/FordDecode.html

 

[Bamamav]

If the intake is part of the valve cover mating surface, you have a FE series engine. 352-390-428.

 

[MercuryMac]

If you intake is partly under the valve covers your motor is an FE, like Bama says; 332, 352, 360, 390, 427, or 428. I will try to take some pictures today of an M block and an FE block.

 

[Yankee Transplant]

on my 351M -400 the intake is below the valve cover , And if i remeber correctly Igot the numbers off it and called the parts house and got the size and year of it here is something too ..

 

[MercuryMac]

Hi akers, I've got some pictures for you.
The first one is an FE motor, a 390 stroker with a 428 crank. Notice how the lighter coloured intake manifold goes under the valve covers.
The second one is a 351M, which should be the same as the 400M, but I couldn't take a picture of the front left side because the A-C pump was lieing sideways in the road on the 400M. On the M motors the heads are quite a bit wider and the intake manifold is narrower.
The third pic is bling for an FE motor.

 

[junker39]

From what I get here:
http://351cleveland.wikifoundry.com/page/Block+400+FMX+
400 with the bell housing pattern for a small block tranny.
It looks like they are fairly hard to find also. May be worth a bit.

 

[Yankee Transplant]

if this is what the back of yours looks like and the numbers match ,, I think Id be on a ford site and selling or trading it for something .... But thats just me