Why do I want one? whats the advantage and hype? Will it work with my stock slap stick or do I have to buy one of those wild looking things?
I have a 440 with a 727 trans to go into my cuda project and yes I intend to race it some.

get one with a low band apply

gotta watch getting on and off of it with out low band apply

hard and fast shifts and its in the gear you put it in at any speed/rpms

its for raceing

I am debating the exact issue! My trans in my AAR is on the fritz (doesn't downshift automatically), so now I'm always rowing that slapstick shifter - I hate it! Although I'd love all the other advantages of the full manual valve body.
Not an issue on a race car, but I getting sick of it for street driving - and I drive stick shift cars! The slapstick to me isn't user friendly (it's too small).
However, I just had a ride in a '70 Dart with a manual valve body and QuarterStick (don't know who makes it) shifter, that was awesome! Too bad it doesn't look stock, otherwise it would be a no brainer.
Very easy to keep the engine on the cam with manual valve body. Especially if you have a peaky powerband.

We went through this same deal with the 72. I already had a RMVB so we put it in. Dad was missing gears all the time.

I started looking for ways to modify the slap stik to work like a true ratchet shifter and never did come up with an acceptable solution.

In the end we installed a TA auto/manual VB. It's like it was made for a slap stik. DIdn't see any difference in shifting or performance between the 2 other than now it's nearly impossible to mis a shift.

hey my friend has a 71 challenger with the stock shifter with a rmvb and all he did was grind the D to 2 detent down so the shifter would slip in with out pushing the button on the 1 to 2 shift then the next shift will be 2-3 the button must be still pushed like going from 2-1 on stock trans .
This seams to work great and smooth he has had like that along time with many differant motors in the car and the car now runs in th 9's in the 1/4 with no cage stock appearing interior and all steel body except for fiberglass hood .