What is a good cam and intake to wake up my stock 400? The only mods it has is a 600cfm edelbrock and pertronix ignition on a vacuum advance distributor. The engine is hooked to a 727 auto.

The engine and drivetrain are from/in an all stock 1977 Cordoba. The engine will be transplanted later on into a 1970 C body, also stock, power brakes, power steering, no air conditioning, about 4100lbs. Both cars will be daily driven street cars. tires are normal height. Unknown what gear ratio, but the 70 C body has an 8 3/4 rear.

Not interested in changing or removing the heads at this point, just a cam and intake change and I would go as far as changing valve springs if necessary. Gotta regasket the engine (except head gaskets) and change timing chain, so it's perfect time to add a new cam.

I have no idea what stock compression ratio is for this year of the 400, I believe somewhere between 7.7 and 8.2?

The compression is comically low.

I can't find the cam card, but I had a 78 400 in a 4 door with a cam very similar to this:

http://www.compcams.com/Company/CC/cam-specs/Details.aspx?csid=707&sb=2

With highway gears and dual exhaust (2.25" with H), the hi-po manifolds, here you can see for yourself it ran well.

https://www.youtube.com/watch?v=cTizSWTZxGo

About a 4400 lb car, doubt an earlier C body is much heavier or even as heavy. The smog heads suck, but they don't flow any less than a "HP" 440 head. About 200 cfm.

You might think this to be a little radical on a heavy car with low compression, but I found it worked pretty well with a dual plane intake (and thermoquad). The last thing I would ever suggest is that you go with a single plane intake with that setup. I tried it. Upper end was good, but it was a dog out of the hole

I'd go with the small Summitt cam and adv it 4 deg. The 1406 is real lean out of the box & MUST be richened on the cruise step. OT I would dial in the dist subsystems in order & some 68-70 HP iron ex manifolds and a mandrel ex system with free flowing (somewhat loud) muffs and in addition some glasspacks alonside the rear leafs to get the noise back to a respectable/tolerable level. The eddy RPM gets rave reviews as an excellent mild to wild intake if you have the hood clearance for it & it's a dual plane/square bore. Not sure if your stock intake is holding you back excessively or not. some gears would help. You need torque/cyl psi & definitely get into the dist curve

A 4000+ lb car with a low cr 400, highway rear gears and a stock torq converter... leave the stock cam and intake. Stock cam is a good torq/mileage cam. Imo any aftermarket one will net you nothing except a lighter wallet. Spend your time and money tuning the carb and recurving the distributor.