Original prop for 74 v step 165 hp 6 cyl?

[spareparts]

sounds like you need a 19 pitch prop, try to get the rpm to 4400 -4600. Watch that clunking, it coiuld get expensive. the inline 6 set ups didn't come with power steering, but they used a long trim tab to offset the steering torque. be carefull with some props as some of them will hit the extra long trim tab. BTW, the trim tab needs to be adjusted to offset the steering torque