Here is a top of the line model....Optima are all sealed I believe...they cost too!

http://www.amazon.com/Optima-Batteries-8010-044-Starting-Battery/dp/B00099HVN6


My 12 volt in my Z28 is great for turning over a high compression engine. Check local parts houses for a better price.
Hank


1951 restoration on website
~~~~~~~~~~~~~~~~~~~~
http://www.hanklong.com