So far these are my plans
327 billet crank
H-beam rods
Forged pistons .040 over
10.5:1 compression
Vortec heads modifided for larger lift
650 DP Demon Carb
Msd Pro-billet
250 shoot Nitrous
Can someone help me choose a cam. Demon recomends a max 240* duration. I want to run the largest cam i can. I also would like around a 3000 stall.
Im still tring to figure out which intake to choose, but im probably going to get a super victor so i can run a direct-port nitrous.
Oh and i want a rough idle

 

First things first, 10.5 is generally excepted as the limit to comfortable compression of cast iron heads. You say "machined for more lift." What exactly did you do to them?

Ive got an Isky Solid roller, it will give you a choppy idle. Its a billet steel cam and is probably too much for you. Call Comp Cams and get a custom ground solid roller. Something with high 240/low 250 int/exh (respectivly) on a 113-114° LSA. Get high .500's lift. That will wake things up.

 

Here's a street cam thats just right for a lil 327 on nitrous.

Crane F-278-2

I would not use a Super Vic for this motor. Its too big of an intake. The Super Vic Vortec manifold is really intended for a high(er) rpm race motor. You'd give up a lot of torque and gain little or no hp.

I would use a Edelbrock Performer RPM or a Professional Products Crosswind (vortec) dual plane. Both can just as easily be plumbed for A direct port Nitrous system.
I would use a Holley 750cfm carb #4779.
A Motor with a dual plane manifold and high stall can tolerate a little larger carb and pick up some top end ponies. the Holley is a good match to a performer RPM manifold. Its a tried a true carb, stock #70(pri) -#80(sec) jetting will do fine.

You'd need to select a converter with a little higher advertized stall than 3000 to actually see 3000 rpm stall behind a 327. Most converters' rated stall speed is rated behind a 350CI motor. I would look for a "3500 Stall" converter.
The combination of these parts would perform real nice on or off the juice.

At the 250hp nitrous shot level you will need to use 100% 110+ octane race gas and retard the ignition timing a bit. Advancing this cam in the motor a little further than specified on the cam spec card (about 4 more degrees) will enhance the power when on nitrous too.

 

Who made your crank? Why dont you sell it and buy a forged one and spend all the extra $$ on parts???

 

That what i said. What!?