Hi there, hope some one out there can help me out.

Have a 1/3 GP pitts special that needs an engine, and would like to try a twin cylinder engine.
Would anyone know the dimension from plug cap to plug cap on the Roto ??
Want to make sure it fits neatly inside the cowl !!

I have a couple of 50cc singles in other models, but this time I'm looking at a twin.

Cheers
Ossie