Hawk makes its own glass slabside and have done so for many years. It will take a 289 or 302 engine without a problem. I am about to photograph a fabulous example that was recently built by its owner as a replica of AC Cars own demonstrator from 1964, APA6B. It uses a 302 and other than the type of engine and glass body, has been finished to 1964 specs. It's a labor of love and a minor work of art!
Hawk have a silver demonstrator and might be persuaded to part with it for the right money - several people have recently made offers so you will need to move fast, although it is right-hand drive (of course).
Hawk also supply the Ace with a choice of engine and are currently building one for a client with 6-cylinder Triumph power. I was lucky enough to drive an example and it's genuine time-warp motoring - great fun.
If you need more information contact
gerry@hawkcars.co.uk or call Gerry Hawkridge on (UK) 1892 750341. He will be away from Friday to Monday at a show. He is also the agent for Kirkham in the UK, builds the best replica Lancia Stratos on the planet (and is the UK agent for the SPF GT40 in rolling chassis form)