Engine 1988 - aftermarket cylinder head vs AOD and injector

The ford heads don't flow that well but the are good for stock intakes and stock related engine stuff. Just adding heads is ok but to get a engine to work well and maximize its potential you need a plan. Better heads require a supporting cast of parts to get the most from them then you have to address the suspension and brakes for the upgraded power, that includes the transmission, decide what you want from the car then you can plan for the required combination of parts to get to your goal.
if your transmission has 100k miles and never been serviced expect problems when applying hp upgrades. It could survive many miles with a head upgrade as long as you don't abuse it.
JMO