help with 440 modifications

I would get the cam recommendation from the cam grinder...you're going to want something to promote building cylinder pressure (not to the point of detonation) with such low static compression. Comp Cams would be my choice!

Carb? Holley Avenger 770. Price is right, vac secondary and usually jetting is dead on out of the box.

Intake? Holley Street Dominator. $216 at Summit and will make more power than any other intake, hands down.

Don't discount a GOOD 2.5/3" exhaust, either and maybe some Schumacher shorty headers.

One other thing to condsider, a Trans Go shift kit and a good 10" (2500-ish stall converter)

All of that could be done for your budget and most likely you'd have a solid, 12-second daily driver!