Agreed 2.02 intakes on a 3.875 bore block is a bad idea. Even if you notch the top of the bore for valve head clearance the valve is extremely shrouded. Even 1.94s are close and shrouded. If you are locked into the 307 take a look at 305 H.O. heads. You could use something like a Manley Street Flow valve with the necked down stem just above the valve head to gain some flow.

If you are still just building this engine on paper go shopping for pistons first to see if you can get some decent flat tops. Cast would be just fine for a mild street engine. Then calculate your static CR by using the chamber volume and the head gasket volume to determine what deck height you will need to get in the 9-9.25 cr area. After that match the cam to your cruise rpm at highway speed and you will be pretty happy.

Tom