SpeedFactory 70mm Cast Throttle Body - B/D/H/F Series Cambelts The other option is using

The other option is using the provided blind hole you can easily tap the head for the second hole

It replaces all of the bulky and heavy OEM accessories with a simple lightweight aluminum plate

Don't risk re-using a stock pump if you have had any kind of engine failure

Direct fit for PRB/PRC and RBC/RRC manifolds

and full warranty policy

SpeedFactory 70mm Cast Throttle Body - B/D/H/F Series Cambelts The other option is usingSpeedFactory 70mm Cast Throttle Body B D H F Series Introducing SpeedFactory Racings precision cast 70mm Throttle Body for Honda B, D, F, and H series bolt on increased airflow, throttle response, and power gains on both naturally aspirated and forced induction applications while retaining smooth throttle operation, drivability, and the ability to fine tune your idle with the plate position & idle air adjustment screws. This is our recommendation for