Join Date: Jan 2018
Location: Coopersville, MI
Pro Street builds
Looking into building my 63 coupe hardtop into a Pro Street build. Looking for ideas and pictures of related builds on original X frame cars(1958 to 1964 Impalas). Right now the plan is.
1. Re-establish existing bodies inner rockers (rust repair/panel replacement)
2. Remove existing floors from toe board to rear trunk pan.
3. Build rear back half part of chassis for dimensional purposes (lots of welding)
4. Take center axle to center front hub dimensions on old frame
5. Cut old frame at designated points behind the front body mount (measure three times, cut once)
6. Build center section of frame connecting the front old chassis to the new rear back half. This will be a ladder style design with two 2X3 side rails.
7. Now those rockers just rebuilt will need strengthening plates added on the inside.
8. Weld the inner rocker to the center ladder bar frame using 1X1 square tubing between rocker and center frame bars.
9. Build out the back area of the trunk support structure and weld to tail pan.
10. Optional: Stretch rear wheel opening if needed
11. Fit up and weld in rear wheel tubs, make sure to re-establish the rear filler piece (between window and trunk) support structure and trunk hinge support structure if the plan is to keep the trunk hinged and not pinned.
12. Weld in 12 point roll cage, this will act as further frame support
13. Mock up drive terrain so a transmission cross member and drive shaft hoops can be installed.
14. Use steel to create a blast shield around the flexplate and torque converter. (I would like to keep my feet if these parts ever fly apart on a hard trans-brake launch.)
15. Finish out floor with aluminum plating screwed into frame metal.
Now is the time to do any other body work, start to hook up linkages, run brake lines, fuel lines, run wiring, Install lexan front and rear windows, Quarters will probably be lexan also as they will probably no longer be able to roll up and down,....
Looking to see if anyone has done this and if I'm missing a big step or if someone had photographs of a similar process on an X frame car that would be awesome. Currently looking at getting 20" wide tires or more on the back.