Com'on man, it's a 440.
Do you really think that on the street, 255s are gunna make a difference? or even 275s?
I think I see new bigger tubs in your future;
or a 2-barrel carb.............. lol.
I watched many, many cars this weekend in Vegas go high 4s in the 1/8th on a 8.5 radial. The x275 cars were dipping in to the mid/low 4s. So yes a 255 or a 275 can be made to hook, even on the street.