Help with Rear end gear ratio

not sure what it will be at. It basically is stock 1987 318 With the swirl ported heads, factory roller cam, and an Edlebrock Performer intake. It will have headers. Not putting a lot into this motor as I said it is just a seat time/experience motor at this point. I figure we hopefully will be mid/high 12's

Are you going to re gear it when you build the 360 ? What are you goals as far as ET with the 360 ?