Battery Capacity

The time will soon come when I have to get a new battery to replace the tiny vaxhaul car one fitted cause I'm sick of getting the starting handle out. My landy is a 1965 11a petrol 88" and the handbook quotes a battery capacity of 58AH.
Is there anything to be gained by fitting a higher capacity battery (wallet and battery tray size permitting) than 58AH? Would it cause any problems?
The vehicle is still fitted with a dynamo and at low revs the wipers, indicators and fan are all slow to operate but improve when the revs are increased. Would a higher capacity battery help with this?
Cheers

Fitting a bigger battery is no problem, you have to think of a battery as a bucket of electricity, the generator fills it and other items draw from it.
From what you say your voltage regulator seems to be getting a bit tired a bigger battery will only give you a bigger reservoir not higher voltage particularly,
your best answer is to fit an alternator, this will get rid of your old regulator, and will give you 50-60 amps compared with 22 from your old generator. You just need the alt mounting bracket as fitted to series 3 vehicles, and modify the wiring where it connected to the regulator up on the firewall. HTSH

Thanks tacr2man, really the whole electric system needs re doing but i'm waiting for a major mot failure to give me the excuse to strip the whole vehicle down and do a full rebuild. That time will soon come.