These engines are hand modified as you can see from the pictures in many areas and feature:
-Hand modified crankshaft with hand polishing of scoops
-Lightened crankshaft that is filled with red putty
-Hand tuned sleeve
-Large diameter Purple Gimar Novarossi head
-GIMAR all metal carb
These aren't available anywhere and are long gone in the RC world.
What you see is what you get, if you have any questions, please just ask!
Thanks for looking and good luck!