Hi Craig,
All the drivetrain options are great, if a little mind boggling, but also the kits seem so much better than the last time I dipped my toe in the kit car field about 25 years ago. Back then the only option I could afford was a glass Ferrari 308 wanna be body on a lengthened beetle chassis. Looked cheap, handled dangerously and sounded like an asthmatic lawn mower - but she was mine
Fair chance that a modern 5 litre v8 will get better economy than my old 1600 chaff cutter!