What is your enjoyment worth? I spent over $15,000 on my dart in my photo in 87', and hundreds of my hours doing the enjoyable work on it. When done then, it was worth around the same amount of money I spent on it. I still have it and drive it often, after 37 years.
Your red door also has the remote mirror hole in it, while the other door does not. Being your door is already painted, you will need a "remote mirror" also.
I say, the start of a broken bolt is when you insert them into "WHATEVER". I always add a little anti-siege when I install some as the water pumps and timing covers, wheel studs or any other locations that seems suitable. I no they make a high temp sealant for the exhaust, but not sure on an...
That is why you have torque specs. The threads on a larger bolt as you say, should also make the threads in the aluminum heads stronger to hold. Just follow the torque specs and no stripping out the head or breaking a weak bolt.
All my trucks have oil bath bearings and they are the way to go. No greasing needed, just be sure you have enough oil in the rear and do a hard left and right, every now and then. I had one big issue once. Sent a rear drum in to have turned and left the bearing in for the shop to remove in case...
Recalls don't save money. A five cents bolt may cost the manufactor hundreds of dollars for repairs, plus a customer in the future. Save me now, I'll pay later, attitude!!!! A bean counter can save a company money or close them down.
Why does the aftermarket header bolts not break, but the stock one do today. I still say the steel in the bolts used today are inferior. When I commented on lowing the Torque, I didn't mean loose, just take a little pressor off the bolt and allow the gasket to take up some of the expansion. Just...
If it is true what you say 19DART66, then maybe a little less Torque on the bolts could be the answer and allow the manifold gasket to take on the different expansion differences. I think it is just "CHEAP" or the wrong steal being used in their fabrication.
I call it a factory defect. Weather it is the thin manifolds, small bolts or the cheap metal being used in them, it all falls on the pencil pushers. Pay it now or a lot more later. When customers pay 60-90,000 for a vehicle, you would think you are getting the best available. The CEO's needs to...
Why not use Fel-Pro gaskets and match port the gaskets to fit over the gap and under the exhaust lower port. Should be enough pressor to stop a leak. Never had this issue on a sb Mopar, but I did on a Chevy 350 and had to double up on the gaskets to get a good cushion seal.