The Sunny kit most closely replicates an "AC 289". When the Shelby contract expired AC Cars had left over 427 bodies but no 427 engines, so the stuck in a 289 and called them an "AC 289" The kit suspension however is still wrong as the AC 289 retained the 427's coil-overs with dual swing arms in lieu of the kits transverse leaf springs.
Don't right off the Sunny kit however. With work it can be built both as a...
FIA Roadster:
or a 427: