5 Speed swap

I had an AX15 in my Barracuda. (Just pulled it this weekend and it's for sale) I have 3.83 gears and was running a Magnum 5.2L.
First gear was pretty much a granny, so when racing I'd start in 2nd. There was a big jump between 2-3 and it felt like the car didn't pick up speed until 3rd. It always shifted smooth, if a little heavy. (I shortened the shifter) I agree with the above. If my rear gears were higher, I think it would better pair with the trans. I ended up doing autocross in 3rd because that engine did not like to rev.

I'm swapping in a Gen3 hemi and debated using the AX15, but have decided to go TKX. Reasons are: not sure what flywheel to use with the AX15, smaller bellhousing for more exhaust clearance, gear spacing and unsure of the strength of the AX15.