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I'm not really sure what you're asking. It's not complicated. The BL5000SLX is pretty much the best fit. The only other choice is whether you want to go with AC or DC powered. Go DC if you want it to be portable and run off the car's battery. Otherwise go AC.
After reading the other Quickjack post last week of some sketchy conditions upon arrival, I was on pins and needles. But it was delivered in pristine condition. THANKS QuickJack / Fedex. Now the Fun Begins...
I got the 5000 ext with 12v pump. My wife has an SS Camaro and the standard 5000 was too short. The ext works with both. The 12v system is a lot faster and I just charge the battery for it once every month or so.