Battery for my 74 Z1?

MFolks wrote: Many riders have changed to the Dry Cell type of battery:

Dry Cell Motorcycle Batteries
en.wikipedia.org/wiki/Lithium_iron_phosphate_battery (Information)
www.batterystuff.com/batteries/motorcycle/kawasaki/
www.pegasusautoracing.com/group.asp?GroupID=BALLISTICEVO2
www.ballisticparts.com/products/batteries/12cell.html
www.spencercycle.com/category-s/232.htm
www.shoraipower.com/t-faq.aspx (information)
www.shoraipower.com

Looked into a couple of these. I would have like to buy one like that, but I have other things I need also right now. I can upgrade next time. I'm just trying to bring this old girl back to life after sitting to rot for 23 years. Still need to find an electronic ignition. Someone robbed the points and cover off of my bike before I got it. Seen a used Dyna S on an auction.
Will this work okay with stock coils. I also have the late serial number, but want to look at it before buying anything.

I just put in a MagnaPower EXT15L (the L means left-terminal positive) AGM in my 1983 KZ750-F1 LTD Shaft. Seems like a good fit, though it just had a walmart wet battery (EverStart 14L-A2 piece of crap) to begin with.

Advance Auto had a 25% discount for online orders, so I just ordered it and picked it up at the store 1/2 hour later for a 25% discount.