The g63b was used in cars and trucks, the g63b was the first gen generation of the 4g63, when you see g63b it means 8 valve sohc, just like g64b means 2.4 sohc, when they added the dohc head in 1987 they called it 4g63. No you can't use the same intake manifold for the single cam engine to the dual cam engine.