Just think it bears repeating what the advice is here. A guy with a b16 asks what to expect from a cam upgrade.

The advice is to remove the engine from the car, strip the engine, buy a new head gasket, source a b18c block that has good bearings, cylinders, pistons, rings and a flat deck, etc and bolt the b16 head on and all the accessory parts, put the engine back in the car and drive.

I'll bet this guy is sorry he ever posted asking about swapping his cams.