I have an M1 on a stock stroke 440 engine with Trick flow 240 heads and a comp cams x284xs I believe 520/541…244/252…..1.6 rockers with a Holley 950. I have innovate a/f sensor in both collectors and the A/F ration is very even on both sides. This engine has 10.5 compression and is very Street friendly. I had this engine in my 69 Dart with Indy ez heads and a slightly larger cam, but with 1.5 rocker and it ran a best of 10.74, now in a 66 Coronet 500 that has to weigh around 4000 pounds with driver and it has ran 11.55, very consistent 11.60s. I had the same innovate a/f setup on the Dart with a 512 Indy eZ heads and Indy 440 dominator manifold with a 1050 and the a/f ratio from side to side varied significantly.
