3.9EFI V8 Engine

Hello
what's the biggest alternator (amps) I can fit to a 3.9EFI engine? and a part number if known? at present I THINK my one is 65amp? but not sure until I remove it and see.

the engine has the V belts NOT the serpentine belts again any part numbers for the V belts required as I would like to replace all the belts ..........................many thanks

I thought I had 100 but a quick browse of tinternet shows 80 as the highest off the shelf range rover to ka chassis no. (When serp took over)

The belt is 10mm x 675mm not sure lr part no.