[Flummoxed]

I'm resurrecting a 1973 Goodmans One-Ten tuner amp, which I have owned from new.

I would like opinions whether I can replace two failed power supply capacitors with physically smaller capacitors that have ostensibly the same specs. The original capacitors are showing signs of leakage and are Erie brand, spec'd as 6800uF, 40V. The cans are covered in blue vinyl, have two solder tags (+&-) are 35mm dia by 102mm long. (Presumably 1 3/8" x 4" in old money!) The 35mm dimension is important for the existing mounts, but it's proving tough to find 35 mm dia allied to ~100mm length without paying a King's Ransom.

So, what's the downside in using readily available 6800uF, 100v units that are 35mm dia item but only 50mm long? (Goodmans stated that the duty of these items is in the 'supply reservoir' ).

Thanks