Just decoded the O/B serial- it's a 86 Merc 200HP V6 ELPTO. Both the heads are off and the powerhead cover is missing, but it's clean and the lower unit is without a scratch. Looks like they ran out of oil and scored a cylinder wall on #1. Steering looks like they converted from OMC to Merc.

I can deal with a rebuild a bore job! I wonder how hard it's going to be to find a cover...

Looking at the hull closer- the stern is solid, no patchwork, fuel tank has an interesting arrangment (using tank in the starboard gunwale?), missing windshield, no gauges in console, has the two swivel seats, etc.

I'll definitely get some pictures tomorrow.