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Dana 60 all the way for your car Brad. What gear are you going to run? Only question if it was me would be Trac Loc or TrueTrac.

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Actually considering at a Detroit Locker more seriously than a TrueTrac. I'm finding mixed reviews of using a TrueTrac in drag applications, but I really don't know much else about them.

The specifics for my junk (not covered previously in this thread) are...
- 3750+ # E-body w/ driver
- 727 w/ 4500-flash 9" converter
- Stock-stroke modified 440
- 275/60R15s DOT Drag Radials

The 8.75" I have now has...
- OEM 742 case
- 4.10s (which is the ratio I'd stick with)
- Power-Lok (clutch-type) diff carrier
- MW billet caps
- Cheap back-brace on housing (too narrow to probably do much good)

Street car w/ best pass of 10.52 at 126+ (6.6_ at 102 in 1/8th) w/ a 1.45 60-ft. I know it pulls the wheels 4+" according to friends who watched the car launch, but nobody ever bothered to provide me photographic evidence.

The new engine should make another 40+ HP, so I'm expecting to be in the lower 10s w/ the rest of the combination (converter, gearing, etc.) staying the same.

Strictly from a budget perspective, the Dana 60 appears to be the more affordable.

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Don't know if this was mentioned before but the Dana S60 will allow you to change gears without spreading the case.

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That is significant advantage to the S60. I have a case spreader, but have never used it, I always got lucky with gear changes, though they took a lot of trial and error.

Now the Tru-Trac (worm geared LSD) is great on the street (transparent and no special lube), but the Detroit Locker would be better for your horsepower level, I think. Skip the spool as it will wear out your street tires and is best for strip only cars...when you get there (trailered, strip only) go with the spool and sell the Detroit Locker to some wanna-be that will more than cover the cost of a new spool