I've had the Odyssey Battery in my 94 for 3 years now. It hasn't failed me once, not even when I was working on the carbs, stopping and starting over and over for hours on end... My 89's going to get one just as soon as I can get to the battery store with enough cash in hand...
I don't know what Sean has in mind but the Odyssey works wonders... You already have the 4 pole starter in your 07. It should spinn the motor like a Vacuum Cleaner...