58' Bertram sportfisher/convertible advice

Hi
I have been looking at this 1978 58' Bertram sportfisher,I believe they made this boat from 76-82, it seems to be a well built solid fiberglass hull with aluminum fore deck and super structure, the boat hasnt been ran and has been sitting in salt water for about 3.5 years,it has a pair of old turbo charged after cooled 2 stroke 12v71 engines showing 9500 hours , no idea how many hours since overhaul , how do the fuel and water tanks tanks hold up in these boats?were they stainless or aluminum?it seems like a lot of metal tanks in this vintage are having problems and need replacing, how do the stainless mufflers hold up? also the aft deck and fish boxes need to be replaced do to dry rot and termite damage, do these boats tend to have blister problems ? the boat is 32volt , it has noerthern lights 4cly.a 7.5kw genset with 1000 hours on it and I believe the boat probaby was built with two generators originally the other being a 15-20 kW ? I am mostly going to use the boat as a vacation condo on the water ,but would like to cruise it occasionally, I have owned several 50-65'boats over the years and refit a few, just looking for some advice or knowledge on what you guys might know about these vintage big beautiful heavy vintage 58 Bertram's and how you tackled some of its problems , has anybody moved the engine room entrance from inside the forward companion way to the aft deck area? Or re-configured the forward staterooms and heads to create a larger master suite and a walk around queen forward? ...thanks in advance for any advice
Kind regards
Matt

Hi
Thanks for your input, the boat is listed in Honolulu, rough shape, it seems even if you got the boat for free, to make it nice for hardcore sport fishing you would really spend a lot more than what the boats worth,what would you expect to pay to rebuild the 175 sqft aft deck and fish boxes? The bulkhead between the generator and lazerete has some rot, where the rudder gear is attached needs to be replaced,the wall and entrance door between the aft deck and salon needs some work,the fore decks and super structure have been painted with a roller and there is signs of corrosion under the paint,the hulls sides will probably buff out, it does have four fuel tanks one in each corner of the engine room and they are raised up like Capt. J commented and actually look pretty good, but until they are full you don't know, the water tank is leaking up highand can probably be repaired? My experience with tanks if there leaking any where from corrosion they are probably need to be replaced,I believe it has an under sized generator 7.5 kW the boat runs 4 cruise air units ,is 7.5 kW enough to to run them ?the grounding system doesn't really seem to be doing its job the , thru hulls and equipment that's supposed to be grounded and a looks like it corroding away,the interior and teak is in great shape just dated and there is some newer appliances in the galley( home stuff not marine grade)the boat has had zincs changed and bottom cleaned twice a year, at about 40 years old it's probably time to change out a lot of the plumbing heads,fawcetts,light fixtures etc, clean up electrical ends, the engines are supposed to run well and be tight, but every thing on this boat really just looks worn out, even as a livaboard I am going to probably have to put a barrier coat and bottom paint ,service and replace thru-hulls repair the after deck ,water tanks ...I would probably change out holding tank and all the waste lines and couple of the heads, plumbing fixtures ,service A/c systems and address the corrosion on the super structure, the last boat I had painted was a 12 years ago and it was 60' riva and it $75k and this Bertram needs lot more prep, so painting the fore deck and super structure other than with a roller is not feasible ....I need to send the broker a check to talk me out of buying it lol..
Matt