Exactly the way I did mine, But I glued the front fender piece to the rear fender piece on the chassis. I also started building the storage lockers and glued the pieces together. It looked like this,
Once it had dried, I removed it as a total unit and continued to add other parts, including the side panels, only gluing them to the rear panel to get a good fit. Then added the firewall and other tidbits to it off the chassis,
You can see the side panels are not glued to the fender. The storage rack w/rails, hood (bonnet), radiator and rear seats are also not glued yet to insure a good fit all around. It's one complete unit and should fit on the chassis with no prob, even with the motor in place. Just double check how far the air-cleaners stick out on the right side. It should fit.....
Sorry again for the pics Ian, but it's better to see it, than me, trying to explain it in words.......
Prost
Allen