Dana or 8 3/4?!? Need opinions

I can't see a Dana fitting with a stock gas tank. I run a 742 case behind my 340 4 speed with Hoosier DOT slicks. I have some old Summers Brothers axles in it and run the 7290 u-joints. I must have made about 20 passes at the drag strip. So far, no problems. The 340 dyno'ed at 458HP.

My opinion - if you NEED the Dana, go for it. If you don't need the Dana, but just WANT one, go for it. Otherwise an 8-3/4 should be fine.