I have a 1984 Excalibur 31 (Not Wellcraft). It's got the notched transom and pad bottom. With worked 330s and TRS drives (and Merc transmissions) I can eek out 70 GPS with 25 mirages at 5100 RPM. With my 26 bravo1s I get 67 turning 4600 RPM.
It looks good now, but next winter I'm repainting the deck and windshield, and redoing the dash changing all the gages.
The paint scheme will never be updated!