d16a1

i just bought an 89 integra with a dohc d16A1. The timing belt tensioner snapped and bent some valves. So im thinking about buying new valves, tensoner, timing belt ect. to fix the problem but i got the idea to turbo this motor. then i got the idea to swap headsso i could get even more power. i have been reading about all diffrent motors for the d16 block. what other head could i buy that would be a DIRECT bolt on to the d16a1 i have now if there is any. someone help me out with this please and thank you.