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68 Roadrunner Post w/ 6.1L HEMI, 6 speed, and IRS

Thanks for all the great pictures of your work, and great progress you are making, that's super. Actually I think I'm more envious of your beautiful new garage, and the floor! Keep up the good work, will keep checking back!
 
Sounds like a great build and trust me you won't regret cutting that floor for 2 extra gears and a smoother shift:thumbsup:.

I can't believe how nice those fenders cleaned up, to bad it wasn't the case everywhere else but still a solid starting point. Looking forward to this build.

So you've got 6.1s laying around???? I'm getting ready to build a 72 Satty for the daughter and have contemplated putting a modern drivetrain in it, she wants a standard too. Anything for sale?
 
I've had several people PM me about needing 6.1 engines and 6 speed transmissions. I've either sold or am using the Tr6060 6 speeds but I do have a couple extra 6.1L Hemi engines at the moment. One with 51K miles and one with 49 K miles.
 
Looks like that you are doing things right. Good looking car.
 
70B5Cuda said:
I've had several people PM me about needing 6.1 engines and 6 speed transmissions. I've either sold or am using the Tr6060 6 speeds but I do have a couple extra 6.1L Hemi engines at the moment. One with 51K miles and one with 49 K miles.
Click to expand...
Yer killin me! I've been going back and forth about goin Gen III. Only would go Hemi was if it was a 6.1. By the way you are making awesome progress on the Road Runner. Good work, keep us updated.
 
I took the dash frame to a local powdercoater, who blasted and powder coated it in a satin black. The only blasting cabinet he had big enough to blast this dash used coal slag, which is quite aggressive so I was worried it would warp the metal. I asked him to turn the pressure way down; he said he used 40 psi (instead of his usual 100 psi) and it turned out great! I am really happy with the texture and finish. Plus I got rid of the UGLY marroon.

I don't have a good picture of the dash frame beforehand, but the metal around the VIN plate will give you an idea of what it looked like. This car had been sitting in a field in western kansas without a windshield for more then 1o years so all the paint had been baked off the top of the dash frame





 
The driver's side quarter panel had a big dent right on the character line. Picture before...



And after...



 
I've got a 70 Cuda restomod that has snowballed out of control. Im currently 8 years into a 3 year build....Im sure many of you can sympathize. My original intent for this car was to be simple. I had decided on just doing some sheetmetal repair and as far as drivetrain, I was going use a Gen 3 6.1L hemi, 23 spline 833 4 speed manual trans, and an 8 3/4" rearend. I didn't want this project to spiral out of control either so I was dead set against change. I just wanted to keep it simple to speed up the build, save money, and not have to cut the floor pans. I had a 4 speed completely rebuilt/ painted and I bought all the parts to convert from a 727 auto to a 4 speed manual.........and then one day about 2 months ago, I had a sudden change of heart .....I decided to install a TR6060 6 speed instead of an 23 spline 833. The 833 4 speed would have been easier and faster, but...

1. I had a TR6060 sitting in the shop....with everything needed to complete the swap. I had parted out a 2009 Challenger SRT8 so I had the twin disc clutch, pressure plate, flywheel, hydraulic throwout, hydraulic line/reservoir, clutch pedals, etc....just waiting to be used
2. I started adding up the value of all the parts for the 4 speed swap: rebuilt 833, Lakewood SFI Bell housing, new Mcleod clutch/pressure plate, Mopar Flywheel, hydraulic throwout bearing setup, z bar, fork, actuator rods, boot/seals, fork pivot, rebuilt clutch pedals, etc and I thought... "Why am I spending this much for a 4 speed?!?!?!?!?" I'll could sell it all to pay for the tunnel and crossmember fabrication work."
3. I didn't want to cut the tunnel and floor for the 6 speed but in reality I want to drive this car to work 1 or 2 days a week ( 30 miles one way) so why go to the trouble of a Gen 3 hemi with a 4 speed?!?!

At first I really didn't want to modify the floor pans since they were pretty solid, but I finally came to my senses. I'm really excited about the subframe connectors, which are made of 2"x4" steel rectangular tubing that channel through the floor pans. Should really help to eliminate flex and improve rigidity.




 
View from below which shows how the 2x4" ties into the rear frame rails



 
Inside of passenger side frame rail







Outs of the driver's side frame rail

 
Originally I was going to make the original K-frame/torsion bar setup work but I changed my mind and decided to go with Reilly Motorsports for the front suspension. The RMS Alterktion setup showed up this last week. Woohoo!

 
Here a few pictures of the K frame to better illustrate the cuts. The first picture is looking at the IRS frame from behind. The cut is a 1" slice that was taken from the right side, just outside of the right differential mounting bolt. A 1" slice was also taken out of the forward bar of the IRS frame (not pictured)


The next two pictures are also taken from the back side of the IRS frame. It shows the "Z" shaped cut on the driver's side-just outside of the left differential mounting bolt. The forward IRS bar also received a 1" vertical slice (not pictured). On the driver's side a straight 1" slice was not possible duet to the contours of the IRS frame and the left side differential bolt bushing.


 
Last edited:
The new subframe connectors channel through the floor pan and the torsion bar crossmember.
Driver's side:


Driver's side:


Passenger side:
 
Master cylinder and pedals were sourced from the Challenger SRT8 I parted out.





 
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