My car was originally a bh23n1b. So no fender louver but is a 4 speed.
You could order parts in Quebec, Canada. Speak French there mostly.

71 Barracuda 383 4spd (500ci)
69 camaro 598, NOS
69 barracuda bbc procharger
77 t/a 6.0 turbo project
78 t/a 400
77 corvette
1983 hurst/olds
03 Viper
79 360 macho
71 demon 360
78 Warlock 5.7 hemi project