Ok today I went and looked at an engineblock for my 91 Coupeand I believe the guy may be lying to me about what type of block it is, I got the serial number off of the block and it is D8AE6015ED16 can anyone please help me determine what size it is.

 

Is it even possibe to tell if this engine is a 289,302, or 351W from this serial number

 

It looks like a 351 cleveland, Check http://home.earthlink.net/~bubbaf250/parts/parts02.html

 

All I could figure out was that it was out of a 1978 full size ford car.

 

Look at the bolts that hold down the valve cover. If the bolts are parallel to each other along the cover the engine is a Windsor, if the bolts are staggered along the cover the engine is a Cleveland.

A Cleveland is a tight fit between the shock towers. Post a pic of the engine if you can