Dave, don't take this as a dig at you or your car, but am I the only one who feels like this combo should be faster than it is?

For comparison, my 3700 lb cuda w/ a stock stroke 440, unported Indy SRs, old Team G intake w/ a 1050 dominator, mid 260s at fifty solid roller, and 14:1 compression went 10.40 at 129.1 mph. 5k stall 727 w/ 4.10s and 28" tires. The only thing my combo had better than yours is higher compression.

If there isn't something up w/ the heads, it might need a lot looser converter to get it moving? Have you had it on a dyno?