I think mine might be original. I'll take a pic and post in a few min. Don't think I'm interested in selling it but could give you photo's and measurements?
But this is not the original frame , sorry but thanks very much for taking the pictures.
A freind of mine just bought a 5,4 with twin 40hp yammies. And certanly will sel his motors but i hope his frame to haha.
I'll make a picture if i managed to buy it of him.