I don't want to get your hopes up, but with a decent size cam and good traction you will probably see 11's. Are you trying to run it on pump gas? If you are, it's going to need a big cam to drop the dynamic compression down some. Especially with the iron heads. This is a crane cam that would work pretty well with what you have. Not very street oriented but it doesn't sound like that is what you are going for. It's a hydraulic, a solid cam would be a better choice if you don't mind adjusting valves. This should definately get you in the 12's with good traction.

Part Number: 110741 Grind Number: H-244/3439-2S-6
Engine Identification:
Start Yr. End Yr. Make Cyl Description
1957 1987 CHEVROLET 8 PERFORMANCE USAGE, GOOD UPPER RPM TORQUE AND HP, BRACKET RACING; HEAVY, PRO ET, SUPER ET, ETC., AUTO TRANS W/3500+ CONVERTER, 10.5 TO 12.0 COMPRESSION RATIO ADVISED. BASIC RPM 3400-6800
Engine Size Configuration
262-400 C.I. V

Valve Setting: Intake .000 Exhaust .000 HOT

Lift: Intake @Cam 3439 @Valve 516 All Lifts are based
on zero lash and theoretical rocker arm ratios.
Exhaust @ Cam 3500 @Valve 525
Rocker Arm Ratio 1.50

Cam Timing: TAPPET @.0040
Lift: Opens Closes ADV Duration
Intake 44 BTDC 76 ABDC 300 °
Exhaust 80 BBDC 48 ATDC 308 °

Spring Requirements: Triple Dual Outer Inner
Part Number 96802
Loads Closed 107 LBS @ 1.800 or 1 13/16
Open 302 LBS @ 1.300
Recommended RPM range with matching components
Minimum RPM 3400
Maximum RPM 7000
Valve Float 7200

Cam Timing: TAPPET @.050
Lift: Opens Closes Max Lift Duration
Intake 20 BTDC 44 ABDC 102 244 °
Exhaust 56 BBDC 16 ATDC 110 252 °