I'm going to try moulded like yours first, if it fails then I'll cut some out of a GTR coupe and do it like the guy did with that BMW wagon.
I've just got a low km 26 out of an unmodified 93 model 32 half cut. I will build it when it goes pop, which I'm hoping wont be for a little while at least. I'll start a build thread when the motor is in so I dont thread steal from you anymore! lol
What specs are you building your motor to, turbo etc?