Andy, my converter comes out at 5100-5200, 6500 shift points, crosses at 6600-6700. Pretty much stays between 5800-6600 most of the run. I really value your opinion, and I’m thinking with a 1.58 60ft, the single plane is doing well. I thought a performer rpm might not cut it. Your thoughts? Btw, I’m still dialing it in, only about 12 passes so far.
I have a pretty similar setup as yours and I run a M1 4500 and a 4150 carb. My best to date 11.35 @ 118 and my 60' needs help and still sorting out the combo. Same weight, 0.40 over 440, 266@0.50 & .600 SFT, Eddy RPM's breathed on a little by Mr. Porter, and 4500 stall. And my best was with leaving it in Drive and letting it shift around 5700, which is below optimal...but I was trying to keep it near 11.50 index at Holley Moparty.
When the engine was on the dyno I ran both a Victor and this M1 and they were almost identical on paper. I went with the M1 due to height and I like the angle machined in to keep carb level.
