A picture of where it hooks on the frame would be awesome.I have owned several factory 4 speed Malibus now and never had a problem with that lower rod dropping out. I could take pictures to show you where it hooks
Factory 4 speed cars should already have the upper stop on the pedal assembly though.
This aftermarket kit doesn't include one and the pedal will lift quite high without it. This is how it looked with the lower pushrod included in the kit.