It will be all about the diameter. This is all pure speculation, as it is not clear if current SCTA rules will accommodate a fresh build.
It has plenty of room, the Markley Brothers second tank with the baby Hemi is a T33 wing tip tank. Later it was fitted with a BBC when Mark Dees had it and then a Flathead Ford with Tony Baron. There have been others.
Just a side note, the Markley's took everything out of their first tank a P38 and put it into the T33 tank and picked up 20 MPH.