Power cables for vintage MC75 mono amps

I've often wondered if replacing the lamp power cords are even possible and worth it.  I have no idea what it would do to improve the sound. Does anyone have experience doing this with vintage equipment. 

19fd0854 23ce 4d7b 9702 415d7b349878zardozmike
Cut the cord and leave a few inches to add an IEC outlet. Then you can experiment with different PCs. Will the SQ improve? I'm a skeptic, so I will say no! YMMV!
Cutting the cord will hurt the resale value of vintage gear, something to consider!
Collecters of vintage gear (like myself) prefer the original ac cord. Only if it's frayed and a hazard is replacement acceptable. 
The last, "vintage" amp that I modded, was an ST-70. I found that the PC could be upgraded, without having to butcher the chassis. At that time, Zu’s Birth was an inexpensive and small(3/8" - 9.5mm) power cable, that easily fit through the original chassis access, protected from abrasion by a new rubber grommet, after removing the stock cord and strain relief. A couple Nylon cable/zip-ties, inside the chassis, on the cable(not so tight as to crush anything), to prevent extraction. Not certain whether they still offer the Birth, but- their Mission PC has almost the same diameter(less than 1 mm larger) and basic construction. The swap provided an obvious/audible improvement, in the ST-70’s presentation(done more than once, actually). Just save the stock cord and strain relief, which can easily be replaced, if desired. https://www.ebay.com/sch/i.html?_from=R40&_trksid=m570.l1313&_nkw=Zu+Audio+MISSION+Power+Cabl&_sacat=0 There’s also a Mk II: https://www.zuaudio.com/cable/mission-power-ii