The 284/528 cam can use a little more convertor and gear than what you have. If you upgrade to a 3000 stall and 4.10, you can probably shave an additional .25 off your time.
A convertor update is on the list. Right now the gears are staying... The last time at the track my timeslips were off a bit. The 1/8 mile et was better, but 1/4 mile was off. Getting some extra slippage at the top end...
