Gear recommendation

Nice street cam. I have run a Crane with similar duration before. Good to 5500.
3.21 or 3.55's are good with that duration.
(I think you'll like 3.55's)
I have run nearly that exact combo before with a 4spd car.

Tips on a performance edge with that combo would be;

For auto trans, 2000/2200 stall
Low first gear trans (3.09)
Wider tires, you'll smoke the stock width Bologna tires.
Good rear springs.
Street light brat can go to 3.91's and I suggest a 26 inch tire x 9 wide. You should still be in your cruise range with the 3.91's. I was with the 4.10's and a 27-1/2 tire.
I don't know what intake you have but a dual plane should be employed.
IMO, a AVS style carb would be nicer. Ether a stock small AVS which are rated @ 630 cfm or the new Edelbrock AVS Thunder series carb.
2-1/2 exhaust pipe.

Enjoy, I did with my combo. Just like yours. Fun ride.
LMAO