[Zoomad75]

I can say this, Q-jets (when tuned) are extremely reliable. Your hard starting after sitting for a while is probably related to leaks from the float bowl that end up below the carb. This causes one major issue; if it's leaking the float bowl will empty. Since it's empty, it takes more cranking to get the fuel pump to get fuel back up to the carb.

It's an easy fix. Remove the carb. Then remove the throttle body. Once the throttle body is off, you'll see 2 large casting plugs and a couple of smaller ones. If it has been leaking they will be all covered in fuel varnish. Clean the area up really good and then whip up a batch of JB-weld and cover the plugs past the seams. Let it cure overnight before reassembling and putting it back on the truck.

Personally, I'd rebuild the carb at that point since your going to have it halfway apart anyway. The kit is under $30 at most parts stores. If carbs spook you due to the complexity, have it done.

My q-jet in my 75K5 has been rebuilt by a pro (my Dad). No fancy tweaks, just a solid rebuild with being calibrated for my truck. I can leave it alone for a month, hop in kick the throttle a couple of times and it lights right up. Runs great on the highway and off road. Never stumbled on me on the steep stuff.