A lot of sophisticated answers here. Why not try something real easy like bumping that timing up to 36-38 degrees. Just try it. Then work on the acceleration rich factor.  Bump the timing up to 38° and it'll wake up. My dad's road runner has 3.54 gears, hemi 4 speed, and a 10:1 440 w/ the 509/292 cam w/ 6 pack induction. It is a blast on the street and will roast the 275-60 tires. Has much better driveability than I expected it to have. I even put the cam in straight up instead of 4° advanced like most do. Timing is locked out at 38°.
CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'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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