A 302 roller block is a 302 roller block, they are all identical. If you are seeing E7TE that is the casting number on all Mustang GT heads from 87-95. They probably are Mustang motors you are seeing.
2000 Mustang GT Steeda #0048 34k miles. 99 Cobra 4V swapped, FTBR IRS swapped, exhaust, tuned by James Gordon.
Just because I give you advice, doesn't mean I know more than you. Its just means I've done more stupid ****.