This part number 577020 refers to fitting Series petrol 2.25 engines pre 1980 & there are other part numbers beginning with NRC for series battery frames suitable for diesel engines only, which had larger batteries. However this will fit a diesel engine as batteries are much higher outputs now and so a smaller battery will still work.
This battery frame is commonly held down with J Clamps and brass wing nuts which will be available shortly, in the correct length.
Please see our other listings for more high quality Classic Land Rover Parts.