increase 60 foot times

Hello
Was recently at race with my Barracuda, 60 foot is bad about 1,65 and best 7,23 1/8
Hooks good and no tire slip, the converter is now being changed from 9,5 street converter with 3000 stall, the new will be 8race converter with 5000 stall, hopefully better 60 foot.. if i should get the 60 foot to 1,5 or somthing how mutch faster is it on 1/8 ?