Vortec 454 swap

[blazinblue]

i have swapped a 454 vortec into my 1997 4l60e reg cab silverado

Things i swapped were 454 harness and black box from a 98 ck3500

the problem is that when i run my 97 blackbox the truck shifts fine but it missfires, its due to the 97 5.7 computer.
when i run my 98 computer it idles fine but it .feels sluggish problably due that the harness is for a 4l80e tranny.

what i find wierd is that the truck shifts fine with a 5.7 60e computer under the 454 harness???

i know i cant do a segment swap in these pcms, would it be easier just to swap my 60e for a 80e? i would really like to run a 60e.

Heres my 454 tune...