Ran the M1 on my 451 low deck stroker and worked great. I had 3.91:1 gears and a 3,000 stall converter. Cam was a bit bigger 251 @ 0.050.

My 505 440 stroker had the RPM intake and it worked good to, cam is about the same size as yours in a manual trans car with 3.54:1 gear.

I'm not sure which intake is taller? The RPM is pretty tall for a deal plane intake. My M1 did not have any holes for vacuum hookup, so I drilled and tapped the plenum for a vacuum source. My HP carb did not have a vacuum port either.

On my RPM intake, I was running a Holley 770 CFM electric choke carb, and it required a 3/8" thick carb gasket to prevent the passenger side fast idle from hitting the manifold.