1970 Duster AlterKtion, 4 Link, LS/T56/Turbo and Minitub

Definitely go with the Malwood under dash hydraulic master! Its 100% a pain in the *** and without modification of the stock mounting location you can't use the factory ebrake handle anymore, however it takes all the stress off the firewall.

I bought one of these before the Malwood kit came out.

https://www.forabodiesonly.com/mopar/threads/clutch-master-cylinder-mounting.423628/
Did you use a Malwood master? My brother is using one in his '71 Demon build and had to go to an electric e-brake kit.