There are a few people on the japanese car scene making cam covers, mainly mx5 and nissans come to mind.You will have to make sure you use a resin system that is heat resistant and also oil and chemical resistant so it doesn't deform or worse. If you want to add a 3d logo into the cam cover, I would suggest you get it machined into the current one, or you bond a logo on top, this will then be incorporated into your tool.
As you are on about using infusion, you will need to make sure that the dry material stack is located properly into any tight corners and other geometry, otherwise you will have lots of bridging and therefor resin rich areas.