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Not that I know of, I read that some people are trying to get LS1 heads to fit, they say they "fit" but their trying to get the intake and headers made. so I'm not sure if that's true, but that's what I read.
Ford used to make one, don't know if they still have them on the shelf or not. There was a link to an aluminum head recently that was still in production. Neither of these heads have water jackets, so they are drag strip only.
I've never heard of using LS1 heads, but that seems far fetched. I'm using an LS1 cylinder head gasket on my mock up engine right now because I don't have a 300 gasket laying around. It doesn't look anywhere close to fitting. Small block and Cleveland heads bolt right on. You can get a set of aluminum small block heads, cut one chamber off of each of them and weld them together. The coolant passages on the intake face also need to be filled or plugged. Intake and exhaust adaptors can be made fairly easily from aluminum plate. IIRC, the cam must be custom ground because the 6 has the exhaust valve in front and the small block head has the intake.