I upgraded my '68 Barracuda's stock rear end with a complete rebuilt A-body 8 3/4 rear end I bought from Dr Diff. It came on a pallet and bolted right in complete with Dr Diff's Econo Rear Disc Brake Kit, sure grip with my choice of gears and aftermarket axles.
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I also run a pair of passenger side 3200 lbs Super Stock Springs, properly fitted slapper bars, a rear sway bar, Koni shocks, 275/60-15 Nitto Drag Radials on an 8" wide steelie rim.
This car tips the scales at a hefty 3750 lbs with a half tank of fuel, hooks up, rides and handles better than any Mopar I've ever driven in the past 40 years. I too started out with a 225 Slanty, but have since gone the stroker 5.9 Magnum route with just under 500hp.
I'm now about to put in an 850hp Performance Injection stroked 5.9 Magnum with a Stage 2 Paxton style blower, so I hope the rear end can hold up to that little upgrade.
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