The short answer would be to cross the line at/near the redline for max rotational velocity. But that may not be possible if gearing options aren't good.
I've never drag raced a CTD Ram, nor have any experience with driving a slushbox version of one. And like said above, the variables are almost endless.
Here goes... (its lunch time):
Using what I can remember from my days messing with the Mustang; and using your 13. 9 time (certainly not a factory representative model), a SWAG for a Camaro/Mustang would say you're around 102'ish mph. (Again, this is a Scientific Wild A$$ guess). But I just saw Rhonda's 12. 68/104; maybe it would be better to guess 13. 9/95 for our trucks?
For trap speeds. Using 35" for rolling diameter, and truck has Auto (. 69 OD) & 4. 10's; Locked up in OD @ 3200 rpm truck will do 118 mph (you'll never see this with your truck in the 1/4 mile). In direct (1. 0 - my math assumes TC locked), @ 3200 truck will run 81 mph (piece of cake, but it'll be a slow ET). Your 13. 9'ish scenario puts you somewhere in the middle here for trap speeds. Have any idea what speed the truck will do in OD with the TC unlocked?
My 1st impression is that 4. 10's probably aren't the best choice for drag racing these trucks; and ignoring the safety aspects of drag racing with 35" off-road type tires, I'm not sure the bigger diameter is helping you either. Smaller tires may help keep you in the powerband if locked up thru the traps.
Irregardless, you want to get the hardest launch possible (nothing new in drag racing), and if possible let her shift up into OD and lock to go through the traps in OD around 96mph @ 2600 rpm.
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