A local guy has a 75 Imperial and NY and I am wondering if there is anything that is nice to have off of these cars? He is using it in a demo derby. It has rear disc brakes-might these be useable? ANy other suggestions?

1970 Barracuda B5 6.1 Hemi/6 speed
1969 Charger survivor in R6 383/727-wrecked 12/24/18
1968 Charger in original burgundy paint "Ribeye"
1968 Charger w/ 6.1L, TR-6060, 9"
1968 Roadrunner w/ 6.1L/6 speed
2011 Dodge Ram w/ 6.7L