Driveshaft for 600hp 4sp ?

JBurch said

What's wrong with going a little over kill...........drive shaft failure is not something to be put down the list of priorities to be worried about.........about the time you have one come up thru the floor it will change your perspective dramatically...........**** happens fast do your best to avoid it

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I had a rear u-jt fail in a mild 318 4bbl Duster w/727 automatic, on a less than all-out acceleration on a freeway on-ramp. From inside, it felt like a bomb went off outside the car. I thought the back of the car lifted a foot or two. It filleted the outer skin off of both my new dual exhaust mufflers. If I was running your combination, I'd be erring on the side of safety.