BORE SHROUDING TEST: 4.03" vs 3.91" Edelbrock RPM Heads Really Fit a 318? Project Mission Impossible

I loved the old days before the internet when I just threw a set of 340 heads on my 318 and went racing. :lol: No one told me I couldn't so I did it, and I went quicker and faster than I did with the 318 heads. Good enough for me.