RMS or Gerst front and rear, but first will be a larger brake/wheel/tire upgrade to get all I can with T-Bars and leaf springs with all new and in most cases upgraded steering & suspension parts.
The FIRST thing I did to my Roadrunner was switched out the front drums for discs. Got the appx. $650 kit via Dr Diff from The Right Stuff folks. 11" drilled and slotted rotors, single piston calipers, and a replacement manual master cylinder. It has the round black plastic caps, and although Cass sent me replacement caps that were a little thicker,
I STILL have problems with air getting in the lines and fluid leaking past the caps. The kit came with new spindles too, and I don't know what "kind" of spindles they are, but I will find out.....
BECAUSE.....
For my wife's GTO, Quick Performance owes me a MAJOR favor because of their mess up on a part of the rear axle housing that is welded to the housing, which I paid $400 extra to have it powder coated. So even if I had the incorrect LCA brackets cut off (they are supposed to have multiple attachment holes along with the stock location so the UMI lower lift bars (LCAs) can be tweaked to change the IC for traction.) and replaced with the correct ones, the powdercoat would be ruined.
So they have to remake the rear axle housing, and I am taking the opportunity to change from factory springs with shocks to coil overs, which I almost did from the get go, but some people convinced me to do the stock layout and use an aftermarket coilover conversion kit if I decided to go that route. Well the rear is too low, reinstalling the load leveling air bags inside the new stock height springs is problematic because the spring perches are different on the QP rear axle housing, and changing out the current spring perch rubber "cushioning pads" to thicker ones to raise the rear end, even if that gets me to a height that is satisfactory, still doesn't allow for any height adjustment, so more than likely I'm going to go with coilovers and have the replacement axle housing setup for them by QP. I also missed my measurements of the width of the rear axle (I told them to cut it 2" narrower than stock 1965 width) We wound up having to use 1/4" spacers on each side because on one side the inside of the tire was slightly rubbing on the inner fender sheet metal-which I could probably hammer out to keep that from happening, but since I'm getting a new housing anyway, I will just have them cut it 1 1/4" narrower than stock and that should allow me to eliminate the spacers (and hopefully still use the SAME alloy axles that were part of the QP package)
SO BECAUSE of that mess up, and I am going to have to pay for the labor to have the rear axle housing swapped out and all of the components and parts swapped over, I am going to upgrade to a really high end Wilwood 4 wheel disc brake system on my Roadrunner, with my new 17" wheels all around, I'm going to use the Wilwood setup that we just had installed in my wife's GTO (dual piston lightweight calipers, 12.19" front discs, 11" rear w/parking brake)...THAT is going to be the baseline option, with 2 other higher end, larger front diameter rotors, multiple piston calipers systems for me to choose from, just going to make sure the rear discs are not too big in case I have to go to a smaller than 17" diameter wheel one day for dedicated slicks at the track.
That is a REALLY long way of saying that I've already upgraded the brakes, but I have plans to go further, and although I was tempted to go with the Gerst front suspension (DAMN that system is NICE!) for what I wanted the system I got is perfect, and with the difference in price between the front suspension I bought vs the Gerst, RMS, Magnum Force, etc I can pay for the RMS or Gerst triangulated rear suspension system, and THAT is something I have DEFINITELY wanted for a couple of years.