Advice On 1966 289 Upgrades

There is a ton off things you can do to beef that 289 up and many different opinions will probably come from this board. Stroke it to a 331 or 347, roller cam, electronic ignition.
AFR 165s are very good heads and probly a little better than Edelbrock Performer RPMs but if you use the performer RPM intake I would stick with Perfomer RPM heads because they are dyno matched and port matched right out of the box. I think Edelbrock may even sell a whole dyno matched package? Not saying the 165s wouldn't go well with that intake but do some research, there may be a better intake choice for those heads.