Join Date: Dec 2002
Location: Saint Louis, Missouri
On my 73 Nova (which should have a real similiar firewall to the 69 Camaro) I ended up moving the stock wiper motor to under the driver's fender. I first took off the old wiper motor and then made a template of the hole opening and of the mounting holes and then took a level and with the template in place on the firewall made a horizontal mark on it for reference. I then positioned the template under the driver's fender and used a level to make sure the template was level and then marked the firewall. It seems to me the firewall was not totally flat and a reinforcing rib stamped into the metal but after it was marked I made a hole in the metal and then used a jig saw to cut the hole out on the marks. I then marked out where the mounting holes were at and drilled them out and then took some nuts and bolts and attached them to where I had three studs sticking out of the firewall that the original wiper motor could slide onto and then by using another set of nuts attach it to the firewall. I also reused the oval rubber grommet to seal it up against the firewall.
I do remember clearance problems and I had to modify the arm that is bolted to the wiper motor with the ball end and on my first try I did not keep the ball end rotating in the same diameter circle as what it was originally and if that is not right the wipers will either not move enough or they will move too much and run over the cowl or the edge of the A pillars winsdhield molding.
To connect the wiper motors arm to the linkage I chose a spot on the original arm and cut it and then after some measuring, took another arm and took a section out of it to make it longer.
It's been a few years since I did it on mine but I also think I had to put a slight bend in the extended arm to clear some of the inner structure in the cowl.
By keeping the original motor I was able to just cut and extend the factory wiring to the wiper motors new location and if it ever fails it's fairly easy to get a replacement for it.
If you reloacte the wiper, leave the wiper arms off first to make sure the linkage works properly and then put on one wiper arm and check it's sweep on the glass and be ready to kill the power to the wiper motor so if it isn't adjusted right it won't damage the cowl or the windshields trim molding.