Im using a vortec blackbox PCM on my setup. Its similar to the early LS1 PCMs in that it uses the transient air calculations along with the MAF/SD logic for deriving the cylinder airmass. I disabled the SD for the most part and just run MAF and open loop. I also disabled most of the transient airmass multipliers except for the TPS and delayed TPS for throttle opening. I also disabled all the filtering on the cylinder air masses due to the engine wanting to stall on tip in. The car is very drivable and it revs well, but I have a large 4 bbl throttle body, and when I quickly open all 4 barrels, the engine snaps out the intake due to the lean spike. Ideally, Id like to try to use the other terms as well for the transient airmass calcs to see if I can reduce the lean spike during a WOT stomp. Anybody mess with these yet? Looking for some tips on what works.