help me choose a carb

I have a 340 4speed car i am working on
the specs on the motor are
73 340 30 over
Eagle I beam rods
kb pistons
internally balanced
2.02 heads
the cam is the comp 268 grind
RPM airgap intake

I have a edelbrock 600cfm elec choke

Looking at Holley 750 model 4150
or
Holley Street Avenger 770 model 80770

Any thoughts would be helpful if i am forgetting anything important let me know

thanks!
justin