Hey, well AFR is the best in my opinion, but if you want to save a couple hundred Edelbrocks will do, if your looking for a period correct look there are some great iron heads too from World.
Im personally running a set of 289 heads that I port matched the exhaust to the gasket. Put 1.84in/1.5ex valves and just smothed the bowls a bit, didnt touch the intake runners though, just massaged them a hair. The last motor I had them installed on ran a best of 8.66@83mph on the 1/8th with a 3 speed manual and the stock 2.79:1 rear ratio on a 245/60/14 tire so grip was down and I needed to slip the clutch past the 60' to prevent tire spin. Compression was 10.0:1 with edelbrock performer, 650 double pumper, tri-y headers, 2.5 exhuast through flows series 40. Cam was their 270H series 224/224 at 50 and 512 lift was is? Oh the car was a 66 coupe, Still running the heads just on a slightly tweeked version of the last motor and it feels way stronger
