I will add a few comments on the fords favor
The cost can be a lot less on a moderately larger ci motor
A ford 545 or 557 ci rotating assembly can be installed and is quite regularly in a STOCK block.
To do this with a chevy you need a aftermarket OR bowtie type block at close to $2,000

The other real advantages worth noting are the bore spacing and semetrical port heads - Chevies use the ford designs on both these points only when you get into high end prostock type aftermarket stuff.

Last note to think about is why does the chevy 572 only make 600+ hp when the ford crate motor at only 514ci makes the same hp and for less money!

just 02