Well, it was the wheel bearings. The left one exploded and we found it had zero grease inside. I guess the front disc brakes would catch and that's why I had brake pressure off and on. The wheel nearly came off. Close call.

Word of advice... I started this journey two years ago. Mustang Steve told me to change the wheel bearings as one of my first things. I didn't listen. Wish I had. Lesson learned.

It's never happened, but got stranded on the side of the road today and had her towed to the shop. I'll explain the scenario and see if someone can help with what went wrong and if I caused it. 1969 Mustang Coupe, 351w. Just yesterday I replaced the idler arm. It had a non power steering idler on it and I installed a PS one. The angle was slightly different, sat higher and the PS slave cylinder touched the bottom of the oil pan when turned all the way in one direction. Very slightly. Test drove it last night, steering was tight and felt great.

This morning on the way to a car show, hit 55mph on US 40 and there was a terrible clunk sound underneath the car. Like I ran something over. Stopped and pulled over. I couldn't see anything wrong. Started back up and started driving and it was random clunking/banging from left wheel. Brake pedal would hit the floor then have pressure, then hit the floor, off and on. Tire seemed to drag on occasion too. Clunking was worse the faster I got. I pulled off and had it towed as it sounded horrible and randomly had no breaks off and on. I noticed no leaks, master cylinder looked ok. Any ideas on this?

Very coincidental, but could the idler arm replacement have caused some misalignment in the steering system, causing a brake failure somehow? I know someone will recommend a borgeson conversion, but I don't have the money for that right now. Unfortunately. Thanks all!

I did my due diligence and attempted a back search on topics, as I'm certain this was discussed at some point, but couldn't find it. There are many, many, many opinions out there on this AND automotive articles to back both sides. That said, I'm looking for actual experience if you have it...

1969 Mustang Coupe, 351w, EFI, currently running a 20" Champion aluminum, 2-core, 180° stat, heavy duty 5 blade mechanical fan with shroud.

I replaced the old worn out stock with an aluminum as I was overheating anytime I'd stop in traffic. Been running the new system for over a year and it sits at 185-190° religiously. The other day I got stuck at a very long light, 90° outside, and I creeped to 223° before the light changed. That said, I do not have heat or A/C and plan to install Vintage Air at some point in the near future. I see another cooling upgrade in my future. This time, going with 24". The question, what cools better, as I never want to be in this place again: 3-core or 4-core? I'll be adding two 11" SPAL electric fans with shroud.

Thanks!

My 69 Mexican made Mustang has no HVAC system at all. From what I was told, they didn't install them in Mexico because you didn't need a heater down there. Not sure how true that is, but either way, there's no heater box, no vents, no ducts, and not even controls (the spot is empty).

I want to have heat, but would like the option to have AC sometime in the future. In other words, I don't want to buy a non AC heater box if I'll need to replace it sometime down the road when I get AC.

Here's the question: would a box for factory AC such as this:
https://www.cjponyparts.com/cj-classics-heater-box-assembly-with-factory-a-c-mustang-1969-1970/p/HBA7/?gclid=CjwKCAiA98WrBhAYEiwA2WvhOtOHadvrPqHdbzYrRMeavlnP37V7yh9RSW3tYluPt-kV01KMeGG3exoCmdoQAvD_BwE

Allow me to just have heat until I get the remaining AC parts? I bought a control for both AC and heater, but have nothing else. Other than this box, am I correct to say I'd need a motor blower, gasket kit, vents, duct work, heater core and hoses. Anything else I'd need and am I over my head on this to do myself? Experience is limited, but learning as I go.