You need a set of good heads flowing in the 270 cfm and up range.
I have a freind that runs a scamp with a 318 and 308 heads flowing big numbers.
Trans brake 904 -- 5000 stall -- 2700 lbs with him in it.
488 gears with a 28 or 29 inch tall tire i think.
He runs 10.70's--------
He just changed the cam.
Before this cam he was going high tens / low elevens with the .557 purple shaft cam.
He shifts at 7500/7500 and goes threw the traps at 7600 to 7800 rpm.
I have always liked the idea of going fast with a 318,but it won't be cheap.