ET Report Card on the Speedmaster Heads

318willrun said
I love the 2.94's when floating down the road at 60 mph. Car is relaxed which makes me relaxed ! :)

I went from 2.76's to a 3.23 Sure Grip in my Swinger. Then shortly after I went to a 27" tall 255-60r15 and it killed my 3.23. I need a 3.73 to get back to where I was before. :BangHead::BangHead: