Berwick,
You are correct, there is an aluminum flat bar fiberglassed underneath the seahood which recieves the bolts for the traveler. Most of mine unscrewed OK, but one was frozen due to corrosion. Will your new traveler have the same bolt pattern? When I ordered mine from Garhauer, they matched the bolt spacing for me....no extra charge. For the end-riser blocks, I reused the original teak blocks but I had to get extra long bolts. Couldn't find any long enough, so I wound up using 5/16 all thread with a nice acorn nut to finish the top and a huge backing plate underneath. If my traveler track ever pulls out, it will take half my cabin top with it