Just put a full on race case glide in it and go 8.60's!  I don't know if you have a clean neutral but it's cool to click it into neutral at the stripe instead of decelerating against the engine. Harder on your already taxed brakes though. Believe me, I would in a heartbeat if I had the money. There's a complete brand new ATI powerglide for a BB Mopar for sale here locally for 4 grand. My family comes first, so I'll just have to work with what I have already. 
CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 4 speed, Dana 60
'71 Demon 340, no drivetrain, on blocks behind the barn
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
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