hi. not really sure where to start. the boat is a 1981 john allmand offshore fisherman. not sure what engines originally were equipped, wasn't able to find that much about it online. it is possible this boat never had twins to begin with, but i know it was offered with that option.
please see these pictures in this imgur album (no spam pic hosting site) for reference to my project: http://imgur.com/a/OLPgi
i have some fiberglass knowledge and have read and re-read the west system guide to stringer and bulkhead repair and reviewed other internet sources but i have some structural questions and i want to proceed in the best way i can without breaking the bank on this project.
there is clearly a lot of fiberglass work to be done all over the place including deck work, transom work, stringer work, and strut/rudder mount areas.. i have no concerns with most of it however the engine mount towers seen in the picture are a concern for me. two or three are delaminated at the base and flexing but all will clearly have to be removed and redone and reinforced but i want to know what everyone thinks is the best way to do so. they need more lateral and longitudinal support but i don't want to create any "hard spots" (if thats something i should even be worried about i'm not sure) or make things any worse.
the boat is still fairly rigid in its current state (can lift most of a whole side off the trailer from a corner with just a few inch lift on a jack) and is on an a-frame trailer. the aft end of the a-frame trailer was modified poorly to make it wider so from the shaft logs back the trailer poorly supports the boat. i've read to support the boat at the stern corners and as far forward on the keel as possible to keep the hull convex when doing stringer repair is this correct?
i was already planning on adding 2 larger bulkheads for deck support and to create separate bilge spaces 1 under the helm where someone cut out the main cross member and another under the intact cross member. should i add small low bulkheads laterally connecting the mounts to the hull and each other in the engine compartment? can/should i use marine ply to add diagonal/longitudinal stiffness? how much "gap" should bulkheads or added reinforcement have at the hull and should i use some kind of foam base to allow minimal flex in the structure?
the engines on this project boat run smoothly despite their age so i'm going to be sticking with them. they are inline 6 chevy 292 blocks with velvet drives. each one is almost as heavy as a v8. when i got the boat they were wildly out of alignment and the logs are worn but serviceable. surprisingly both shafts are straight within 3 thousandths. someone had done a very poor job repowering and mounting as you may see in the pictures. you can see how high they are in the cockpit i don't think i have a choice about that unless i move the locations of rudders struts and logs completely (don't really want to that)
i'd greatly appreciate any and all constructive advice.
thanks in advance,