I use an Interstate I-45:
http://www.interstatebatteries.com/estore/search.asp?details=1&mscssid=AQBQ7CM6164L9KKLN93C104W6S330S36&N=2147384794+4294574530+2147384769&js=1&part_number=I-45&part_desc=Interstate+-+65+Months+-+480+CCA&Nu=Part+Number&Ns=product+Type%7C0%7C%7CRank%7C1
--- In MarcosManiacs@yahoogroups.com, "smiglit" wrote:
>
> Hello,
>
> I have been restoring MBG55H for what feels like the whole of my life
> and have now reached the point where I need to purchase a replacement
> battery.
> Can anyone advise to where I could purchase the correct battery for a
> 1969 2LTR V4?
> I live in the UK
> Having looked around, local retailers have never heard of a Marcos so
> they don't know the correct model of battery required.
> I have taken the measurements of the original Battery tray on MBG55H
> and all modern batteries that I have seen are too large to fit.
>
> Thanks, Mick.
>