It would be a shame to break the engine for parts Steve which is why I decided to use the complete engine. I wont be trying to build a complete mc16 f3 either though, I want to be riding it not spending years collecting the correct f3 parts. Its going to be a mix of parts in a 21 chassis. I think I will probably end up relocating the rear engine mounts on the frame to be honest, I could always get some spacers made if i wanted to put a 21 motor back in it.

Thanks for the offer of a set of 16 f3 carbs but I will be using a set of 21 f3 carbs I have tucked away