Originally Posted by lt1silverhawk
Thanks for the response. So you answered the main question, and that is all the companies did always use the Ford blocks as the foundations. The different displacements and power outputs is to be expected.
Since you did bring it up, what is the standard angle for the Ford blocks, vs the oddball 30 degrees (I hope I worded all of that correctly)
Also, which parts will usually not
I really think it depends on what exact motors you are talking about.
Some of them were quite different.
Here is a discussion on the Lincoln "Y block". Click here