John,
Here's what I just installed in my GMC 4X4 PU with it's 350/5.7L engine. I got it at O`Reilly Auto Parts. Note is has both kinds of terminals - side terminals and top posts. 3 year warranty. AGM, so zero maintenance and almost no loss of charge sitting around between uses ... which my PU does - sit around a lot - but when I want it to start and run I want it to do just that with no battery issues year after year:
http://www.oreillyauto.com/site/c/detail/SSBQ/3478PLT/03321.oap?year=2006&make=Chevrolet&model=Silverado%2B1500&vi=1432426&ck=Brand+Search_C0423_SSB_1432426_-1&mn=Super+Start&mc=SSB&pt=C0423&ppt=C0005