You cant go wrong with a pair of edelbrock heads and a rpm or rpm airgap intake. I know that is more than what you want to spend but I would not go to the expence of porting the 302’s because of their limitations. And if you do port the 302’s have them done by someone who knows what they are doing cause air flows where it wants to not where you think it should. I learned alot from Charles videos and David vizard as well. I had no idea air flows like that in a head. An inexperienced porter can ruin a pair of heads right quick.