The modern radio's all use a final stage power module that has automatic protection but like with any kind of protection you should try not to need it. Older radios (but how old?) don't have that and can be damaged by a big antenna mismatch.
About the standing rigging: if it's from 1978 you sure must replace it. You should also not use that surveyor
anymore because he should have told you that the likely problems are in spots you can't see like inside the swage fittings. It's 32 years old!!
There is some rigging guy here in Colon, Panama
but if it would be for me, I would replace it myself. Measure your stays & shrouds and order them in the USA with one swage end-fitting (upper end) attached, a couple of inches extra length and a Norseman or Sta-lock fitting for the other (lower) end. Ship that to Panama and replace one by one. Take an old one off, pin it stretched out on the ground, new one next to it, cut to exact size and put the Norseman fitting on. Easy and fun job to do. The extra cost for the Norseman fittings and shipping
is easily compensated because it's all much better priced in the US.