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Front Subframe Installation - Car Craft's '71 Dodge Demon

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Front Subframe Installation
Front Subframe Installation

So far, the Demon project looks much cooler than we imagined. We wanted to capture the feel of Don Schumacher poised on the line at OCIR in 1969 in his record-setting Stardust Funny Car. To do this, we tried to adhere to the ethos even while using available parts that weren't as era-correct as they should be. A glaring example of this is the use of ET Gasser wheels instead of Halibrands or spoked Americans that you'd find in the late '60s, or the Cragar SS/T or Center Lines you'd find on this kind of car throughout the '70s. We're also cheap, so instead of spending the $3,400 market price the era-correct rear 15x10 Halibrand mags command, we found a pair of vintage U.S. Indy mags with the right offset for $60 on Craigslist.

We know it's fun to stare, but we don't do trailer queens at CC. This car needs to be both quick on the street and ultra brutal at the track if we are going to live with it. Like salt sprayed on a prewar jalopy from a lap at Bonneville, the runny shoe-polish dial-ins and car numbers on the flimsy plexiglass will be proudly displayed as we cruise Ruby's in Redondo Beach on Friday nights, hopefully with some flame from the turbos licking the primer off the welds.

Front Subframe Installation

That's right, turbo Hemi. And to get the snake pit under the hood, we decided to go full enchilada and hack the front end off the car, replacing it with a Chris Alston 2x3 A-arm front frame system. Because that's what Schumacher would do. In addition to a wicked stance, the subframe kills somewhere in the neighborhood of 300 pounds of excess weight and mates to the existing Chassisworks back half and four-link ready and waiting in the rear.

All you need to get this project done yourself is a flat garage floor, a tape measure, a Sawzall, and a MIG welder. Let's go.

  • Front Subframe Installation
    Last month, we ordered a 3x2x0.083 boxed frame from Chris Alston, which had a 29-inch width and 6 inches of ground clearance. Using the 29 inches as the base, we added 131⁄4 inches for the suspension and another 4 inches for the wheel offset to get the distance from the outside of the wheel and tire to the lip of the front fender.
    Front Subframe Installation
    Last month, we ordered a 3x2x0.083 boxed frame from Chris Alston, which had a 29-inch widt
  • Front Subframe Installation
    Before we removed any parts from the car, we made a mark on the door and measured the distance from it to the front wheel spindle centerline. With that number we had the information to position the new frame under the car and retain the stock wheelbase.
    Front Subframe Installation
    Before we removed any parts from the car, we made a mark on the door and measured the dist
  • Front Subframe Installation
    Our measurement was 25 inches, which we had wisely written on the door. Using that number, we made a new mark on the floor that represents the spindle centerline.
    Front Subframe Installation
    Our measurement was 25 inches, which we had wisely written on the door. Using that number,
  • Front Subframe Installation
    We also measured off the driver side and connected the dots with a green tape line we used to line up the frame.
    Front Subframe Installation
    We also measured off the driver side and connected the dots with a green tape line we used
  • Front Subframe Installation
    The suspension mounts were already welded in place by the guys at Chris Alston. It’s an option we recommend. The frame was long so we could cut it to fit.
    Front Subframe Installation
    The suspension mounts were already welded in place by the guys at Chris Alston. It’s an op
  • Front Subframe Installation
    We cut a template to cap the hole and provide a place for us to butt the new front subframe.
    Front Subframe Installation
    We cut a template to cap the hole and provide a place for us to butt the new front subfram
  • Front Subframe Installation
    In this photo you can see both caps and where we intended to weld the new frame along the inside of the old one.
    Front Subframe Installation
    In this photo you can see both caps and where we intended to weld the new frame along the
  • Front Subframe Installation
    This was the tricky part: Knowing where we were going to butt the frame, we needed to make a new measurement of the distance from the spindle centerline to the face of the plates on the crossmember. Having a tape line in both positions makes this measurement easier.
    Front Subframe Installation
    This was the tricky part: Knowing where we were going to butt the frame, we needed to make
  • Front Subframe Installation
    Measure twice, cut once.
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