Yep. There are two brackets that are mounted/lag-bolted to a 3 inch laminated marine ply block that is glassed beneath the floor above the balsa-core . I have a couple extras that were used as engine mounts from the 1985 HD i/o (they have a couple more holes than normal) but if you need them, they're yours. The original pylons are hard to come by, get them if you can if you want to keep your boat looking true the period that it was built. My 75 brackets and pylon are attached (boat is sold and in Avon, CO).
Forgot to mention ( if not obvious) that this is an I/O but would imagine that the outboards were similar with respect to the base mount.
