does anyone have the name or part # for the heads. i have been hearing the buzz and i am building a motor so i want the best that i can get. i hate redoing things.

 

51309 is the 190 port head designed for 351 based engines, and 51319 is the 170 port designed for 302 based engines.

The 170's outflow AFR 185's, and the 190's outflow Edelbrocks own Victor Jr heads.

http://www.edelbrock.com/automotive_.../flow_data.pdf

It's the first 2 heads listed under Ford