turbo action full manual reverse valve body

I just purchased the last item I need to finish my car for mopars at the strip.

just picked up a full manual valve body with a reverse pattern and a tci outlaw shifter.

ive done shift kits before and have play with valve bodies a little bit so im familiar with the install. i rear somewhere that i need to replace my shift lever to a 5.0 to keep from burning up 1st gear. is this true?