Ford 170 or 200, Old or New Casting- OLD SCHOOL Mustang, Falcon, E100 Econoline Motor Identification

[@chuckchungus4512]

Thank you sir. I have a 65 mustang that has been swapped with a 68 200 inline six I appreciate it a lot I’ve been trying to figure out if it’s a 170 or 200 also thanks for showing me the location of the casting numbers!

[@diesel4life324]

I recently learned the 60’s blocks 144&170 have 3 frost plugs, 200 and up had 5