RustyBucket, the 5 speed conversion isn't difficult. The only pain will be in your wallet. In addition to the very pricey trans, you'll need a different engine spacer plate, trans crossmember, driveshaft, shifter plate (plus other stuff I'm sure I'm forgetting) and you'll have to relocate the hole where the shifter comes through the floor of the body tub. Plus, I had my trans rebuilt since I had no knowledge of what it looked like inside. Another expensive endeavor, but I'm so glad I did it. The rebuilder called it a "time bomb" in the state it was received.
As far as power, I'm going to roughly estimate 199.7hp, since that's what it made on the dyno.

Scroll up on page 7 of this thread to see the YouTube link and dyno graph. Assuming 10 to 15% drivetrain loss, it should be 170 - 180 at the wheels. We will see...
Erik Miller
Concord, CA
1970 Datsun SPL311-29945, owned since '95. Back on the road in 2022!
Two 1967 Mustangs
1981 VW Rabbit Truck, 1.6 turbo diesel
...Oh, and a daily driver.
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