Cam selection help

I have a 440 with 30 over pistons stock 906 heads, 4000 stall, 3.73 gears and back tires are 31 18 15 back tires. pistions are trw L2266 flat tops. I plan on buying a set of 440source stealth heads in july but want to drive the car now so i need help selecting a cam and speedometer gear for transmission.