No they don't.

OP. Go with teh 1.8 block. Use the C1 head.
Stay with stock cams unless you want to waste your money.

Invest in a nice set of springs and retainers. Use the wisecos and a nice quality rod.

I personally use both stock and cometic headgaskets and have had success on both.

If you DO must go with a big cam, make sure you use a tubular manifold.
All motor cams + tubular manifold + big exhaust side = power.
All motor cams + log/cast manifold + no matter the exhaust side = loss in power.

Research.