General Bike Ravings

So it has begun the day of birth is set to be sunday the 9th of aug little jubba the rg 250 frame is ment to be droped off to its new home to start its new life as jubba the bucket.
so the idea so far it to put a loncin 150 engine in to it but as this is my first project i dont no how i am going to get the mounts on for the new heart as the frame is alloy.if any1 can help with this it would but geatly aprecated.
so ive been saving for bike bits an gears and have ...