My 96' Lo Pro freightshaker has the 5.9B, 210 HP w5 speed synchro. Its adequate but the rear end is geared so low, I'm in 4th gear at 25 mph. I'm in 5th at 35 through 55. At 55, she's screamin at around 2400 rpm. Bottom line, 5 speeds is not enough... 4 more would be ideal.