i want to stay loyal to aquasport, but i would post that question over at classic mako and seacraft. Very talented guys here but just the volume over there i think you would get many responses in a day, especially at c mako, and guaranteed ever a dozen who replaced transoms, with pics and step by step updates.. And somehow have tons of $, and more free time than the golden girls.
And btw if you have the transom open, don't know your AS size, year, etc., but do yourself a favor and redesign your boats bilge, wiring, plumbing, etc. ACCESS and PLACEMENT. In my opinion the biggest flaw and afterthought of an otherwise timeless design. 1970's boats have half an excuse, but my boat is late 80's and has leaps and bounds less access to replaceable parts of comparable manufacturers. Something that causes me 1-15 problems every spring, and something that has caused a dangerous situation on the water for myself as well as passengers 2-3 times. My plans include cutting the horrible livewell out of the splashwell for starters and replacing w/ a big watertight hatch that will afford me and my slightly overweight 6'1 230 lb frame access to the bilge and wiring for starter. But having the transom open and having it all to change???Oh lord, let me count the ways....Please keep us posted