1970 340 air cleaner dimensions?

I’m going to attempt to draw one in ONSHAPE, to make a mold. So I can make a carbon fiber one. Will have to 3D print a multi-piece mold. Picking up rusty one this weekend to measure.
Would a carbon fiber mold that was formed to the inside of the oval openings be strong enough to hammer the lips into shape? If so, I would be interested in one or two if you make some.