QUESTION:1966 PLYMOUTH VALIANT

It had its challenges to say the least: exhaust, fitment, accessories, K frame, tranny tunnel, etc. One idea we took from the old Super Stock Hurst hemi 68 Barracuda was using steel braided flex lines from the master cylinder to the hard lines in the frame so that I can unbolt the master cylinder and place it on the fender without opening up the hydraulic system in order to change spark plugs or remove the valve cover. Other than that my experience with exhaust, accessories, cooling etc will be a completely different ball game than for a gen2 hemi swap. I used the RMS Alterktion for clearance and other advantages but had to refab the driverside motor mount for Jeep SRT8 exhuast manifolds, again that won't apply to you and you'd likely encounter other unique challenges. I notice that there isn't a forum for old hemi swaps so I'm not sure where a better place for your query is.