I'm trying a new routine for a little change-up.

It's posted here:
http://www.wannabebig.com/article.php?articleid=146

I find that if I go for 75% of my 1RM that I can't do 8 reps.

I suspect I might not be warming up enough.

These small problems aside, is this a good workout to improve strength, or will it be overworking these big muscles, or underworking other areas?

I'm used to working each body part 1x per week (chest/tris, back/bis, legs/abs, and shoulders/traps/grip)

I'm alternating traps/grip on monday, abs on wed and calves on fri.