help on performance decision

So get the converter and whatever bolt ons bigger carb or headers etc. that you can and then save up for a new shortblock or stroker for later.
good luck

are you going to run that cam with the new heads? GREAT cam and Comp specs recommended a 2000 stall converter but will work with stock piece

My opinion I would get converter and a Transgo 2 kit for your 904
you will be better off.