M1 Intake Manifold SBM

340inabbody said
Hey guys! I am having a real challenging time getting my 340 with an M1 single plane intake and a Holley 4150 to fit under my hood on my 1970 Roadrunner with an Air grabber hood. I have a few questions for you guys regarding the M1.

Use a drop base filter air cleaner set up from Mancini

340inabbody said
1. Is the M1 that much taller than an Eddy Performer or Air Gap?

I’m not sure on this. Edelbrock should have manifold height on there see site but for sure in the paper catalog.

340inabbody said
2. On the M1 it might be necessary to add a vacuum line but where to drill? Is there a good place to add a port or no?

For what? On the intake runner closest to what it is you need it for.

340inabbody said
3. Posted on the Bbody site. Thinking of disconnecting the PCV to the manifold

Stop right there, the PVC connects to the carb at the front on the carb. Not the intake manifold.

340inabbody said
With a check valve on does the lack of vacuum prevent proper ventilation ?

The PVC valve should have a check ball or something or the sort in it.

340inabbody said
Is there an easy was to passively port the PCV?

Port the PVC valve? What in earth would you port a PVC?
There is no good reason, zero, none, Nada, zip!!!

340inabbody said
Thanks yall!