Thank you again to all! It wasn't me that did the "mods" to this thing
actually from searching around the truck had a 300 six in it! Great motor!!
I have owned two of those before! But the last owner (I assume) did the deed
of the upgrade motor, and it really is anybodys guess if it was and is
actually a mustang motor! The air cleaner suggests that it was to fit under
a low profile hood as the element is side mounted to the carb! The last
owner told me it was install while he had it but fail to tell me why the 300
was replaced! Thanks again to everyone who replied!