I've got a 5 speed I took out of my 84 359 from when I put a 6 speed in. I don't have an extra brownie though. You gotta be careful with the brownie, running fast when it's 100 outside will get the brownie super hot. It doesn't hold much oil. I've got 390 rears, I'd like to put 336 in it, then the brownie wouldn't be turning as fast and may not get quite as hot.