When I think of the attributes that make a desirable offshore
boat, I usually think of a low vertical center of gravity, long waterline to overall length, an easy to depower sailplan or a sail plan that offers a lot of easy sail combination options,a small cockpit
with large drains, minimal opportunities for downflooding, small, heavily constructed portlights
, an interior
with the major functions gathered near the center of buoyancy, or just aft of C of B including seaberths for half of the crew, narrow walking passages with lots of handholds, ample storage
and tankage, easily accessed systems, robust engineering, etc.
Assuming that you are asking about the late 1960's through early 1980's Bill Shaw designed Pearson 35, while there is a lot to commend these boats as coastal cruisers, Very few if any of the items above would be true of the Pearson 35. Don't get me wrong, these are nice boats for a whole lot of things, they just are not very ideal as offshore
boats and most are now approaching 20 to 30 years old and would need to be refit
if they haven't been already.