Go to
www.fiberglassics.com then there glassic library icon. under aluminum boats you will find starcraft,take it from there. The motor bracket is a add on and may have been done to give you more room in the stern of the boat.If it had a I/O you should be able to see the patch work done and if it was a outboard you will probably see added on metal where the motor well used to be. In any case I doubt this set up will hurt the performance in any way and if anything is a positive add on if you plan on fishing. The hardtop is also a add on. Fairly easy boat to mod anyway you want,dont use pressure treated wood on aluminum boats. IF the engine checks out the price seems to be inline for that area of the country,maybe I would go in there with a offer of 12-1300 after sea trial with cash in hand. There is not much deadrise in that hull,maybe 10 degrees so it will be a bit of a hard ride in chop and the trade off is it will sit better [ not rock as much ] when trolling,drifting or anchored than a deep V. ......Looks like it was the Holiday model and went for 1295.00 in 1966 ,was a I/O and has been converted to a outboard....The only thing that has me wondering is where the motor sits in relation to the hulls bottom. The horizontal plate above the prop should be about even with the bottom of the boat. So if you took a yardstick and placed it against the bottom it would intersect with that plate above the prop.If it is mounted to low the peformance will suffer. It could also be raised with a jackplate or something more permanent if you didn't want to spend the money on the plate,not a deal breaker if your going to restore/mod it anyway.