'good enough'

that's the only reason one should use an antique ECM

or because you're poor like me, or like a challenge

if you desire real control, upgrade

the 1980s and early 1990s ecms were a dark era in fuel injection

tuning mid 90s and up ecms is a very different experience

im not saying you can't make the car just fine with this dual ecm plan, in fact its something i might do if i had the parts laying around, it's just that it's really not optimal for what you're doing and your goals