Crusing and AFR goes from 14.7 to +/- 19

[LQ9_Jeep]

Vehicles: 2004 Jeep Wrangler
Did a V-8 conversion to it, installed a GM Vortec Max 6.0L. flat-top piston, 10:1 compression from (2004 Chevrolet Silverado SS), heads (Rectangular-Port), & intake comes off 2012 LS3, with 42 # injectors, cam is 224 duration @ .050, with 112 Lob Center. My controller is P59. Use only 93 octane, 4L65e Transmission.
Having problems with the AFR randomly go lean while cursing 50-58. Drop my gas tank check tank clean, fuel filter clean. Attach is a screen shot of the event.
Thanks John

[R0G3R]

Have you adjusted your injector flow data for the bigger injectors? Also have you done any changes to the VE or MAF table?

[LQ9_Jeep]

The injector rate & VE table was updated when it was last tuned last year, it had been running ok. My plans was to get this fuel stuff straight then clean up the VE table a little. The regulator I'm running is off 2000 corvette system. Waiting for all the part to come in and will set up adjustable regulator with return line, to make sure the fuel pressure is steady.