Here's a post from one of our members that may help. Just remember to work slowly with the right tools and it can be a very fun and rewarding project. I have an old Hot Rod post I will try to dig up also.
https://board.moparts.org/ubbthreads/show...e=3#Post2885759
http://www.popularhotrodding.com/tech/0610phr_cylinder_head_porting/index.html
http://www.moparmusclemagazine.com/techarticles/5115_cylinder_heads/index.html

1970 Duster
Edelbrock headed 408
5.984@112.52
422 Indy headed small block
5.982@112.56 mph
9.42@138.27

Livin and lovin life one day at a time