[Amps] re hv electrolytic capacitors

[Fern Rivard]

    I want to replace the original electrolytic capacitors in my PT-3000A hf amplifier. The original caps are Mallory 210 mfd at 450 wvdc with part # CGS211T450BF1. They are screw on terminals and the spacing between the terminals is 0.5 inch with a diameter of  1 3/8 " and length of  4 1/8" for the body and 4 3/8" to the end of the screw on terminals.
    Now, I would  like to replace with some that would give the most capacitance but still with the same physical dimensions especially with the spacing with screw terminals of 0.5 inch and the diameter but the length could be different.

    Any help would be greatly appreciated.    Thanks from Fern