got a chance to crawl around under this '68 barracuda that's had a 383 and 4 spd put in - Number on diff. case is 2881489 which I've read are '69 and up. sound correct? Also had a small tag-like piece under that with what looked like 465710A . Is that telling me anything? Not 100% yet if this sure-grip. I found 2 bolts on top of housing that are not torqued down - probably sounds ridiculous but is there any reason they should not be? appreciate any comments. thanks