My car in Seattle might run low 5.2 on motor only, maybe even a 5.1
I do have a bunch of NOS parts and a low deck Indy 2x4500 tunnel ram intake and two 4500 NOS plates as well as a pair of 4500 that might get me into the mid 4.5, no where near 4.0 or high 3.9 though
I do have alternative motives to show off my car at that kind of race though