ChaddChilliChadd wrote:Matt this may be of some help
http://www.janschutz.com/Mustang/Markings.htm
thanks for that. Might have to check the DSO on Johns car but that link is for 289/302. Johns is a S code 390
Im pretty sure it should have the 3 lines at the back end of the tail shaft and 3 on the leaf springs behind the the shock plate...just cant remember
Matt
.