First if I were training for strength only I would have more of a power-lifter's split and not a bodybuilder's split. Second, where is your shoulder work? One power-lifter who I interned under never specifically had a chest day and upped his bench by upping his overhead pressing abilities. His article is published on the EliteFTS website.
http://www.elitefts.com/documents/be...or_dummies.htm
Finally, if you don't seem to like anything I have said at all try a program called MaxOT. It worked wonders for me and you can find it online just Google it.