Since you have an OD with the 80e plan to drag it, 3.73 at the lowest. Many 1000hp+ 8 second cars run 3.73's.
Best suggestion I have is go to Wallace racing calculator online, type in 3.73, 5% converter slip, 28" tire and 1-1 ratio for 3rd gear and it's like 148mph at 6750rpm or something. It's going to drive great on 3.73, 4.11, 4.30 or anything in there is a good choice also.
You might loose half a sec at the track with a 3.73 that's more 1000hp 8 second territory over a 4.56 that's more 375hp 13 second territory but if you know you're going to swap boost down the road, determine what your goal quarter mile time is, determine the trap speed, and do the math to find the gear.