I have two chips that came with all my TBI stuff for my conversion. The guy i bought it from said one chip was from a 4.3 v6 and one was from a 5.7 v8 both m/t pickup truck... I really dont think this is the case. I have tried the lookup page but it doesn't seem to return info.

One has BHAN lettering the other has BJYN (supposed 4.3) lettering.. The BJYN runs, but poorly.. looking at the data logs from tuner pro I think its for a v8 as the idle is crazy fluctuate even though the engine is running somewhat smooth, like its missing a couple of cylinder counts.. IDK..could be a mismatched bin file ect.. Can anyone confirm what these chips are from?

My ecm is a 16196395