I showed the photo to a good friend of mine who is extremely knowledgeable with cars and this is what he said: "I doubt that it is/was an Ace. The rear wheels hubs might make it look
like an ace but many fiberglass kit cars were using Jag chassis; so, it could be a 140/150. The guy who thought it might be a Ladawri might be right but I need to see the front. It could also be a Fiberfab, Devin or ? They all used molded dashboards. All for now, MD"
Looking at the rear suspension geometry, this car is very likely to have a solid axle at the back, I agree with my friend Michael, probably an XK chassis, the rear knockoff says "Jaguar" Actually, while I think about it, Jaguar used a #52 spline hub, it means that one would not be able to use a Jaguar ear on a non Jaguar hub. The axle and chassis are most likely Jaguar. No matter what, this could be a neat car to restore. My 2 cents.
Emmanuel