390 w/open chamber heads

It can, yes, by association, but the fact is if you pull the intake off and compare it to the ports on your J heads, you'll see the significant difference in port sizes. I know Edelbrock says it'll fit up to and including a 360, but it's really designed for engines utilizing the smaller 273/318 port heads...which will physically bolt onto any LA Mopar...by that rationale, they could be bolted to a 426 stroker, but that doesn't mean it's a good match for the displacement, compression ratio, cam timing, etc.

When you read the full description from the Edelbrock website for the different intake manifolds, they give you some rough parameters to match up parts. Yes, Edelbrock says it's intended usage is for the idle to 5500 rpm range, but again, that's for a smaller displacement group that have to maintain some runner velocity to enhance low engine speed torque.

When you add stroke (displacement), it changes the breathing (demand) of the engine. Based on what moper said above, you're going to need more cam to satisfy that 4" stroke...other things that have to be increased are the breathing capability-that's where your intake, carb, and heads come in--along with capability to expel those spent gases through the exhaust.

With a 390, you're essentially building a big block in a small package, the only thing you're not swinging is the big weight of typical big block parts, but the demands of an engine that size are still very much the same...and strangling a 390 ci engine with an intake designed to feed an engine 80 ci smaller will limit your breathing all around-not just the top end.

It is your engine, and feel free to do with it as you please, and it still won't be a turd or anything like that, but it'll definitely be way below potential.