I installed my share of them .the 625 plus the Ignition was Ktron
And still have the stickers from them on one of my old tool boxes, the accessories were gear driven ,Only the high pressure fuel pump was Belt driven. A piece of art work
His crash box had a Hydraulic pump mounted on it for the Power steering.
The setup was impressive with the old mans headers installed and all the Braces he made for them really brutal!!It was like you could pick up the boat by the exhaust system.
As a side note; in those days there was some talk of the gear drive system requiring more Horsepower than the Vee belts we ran in those days, Ritchie Powers ran an engine with the old mans gear drive on a dyno then changed to belt drive no measured difference!! in reliability that system was Bullet proof !!