Now, Now Fredddd,
Do you really think the 65 Mustang is perfect?
My sons turned into a 2.5 year complete restoration.
Lets see, leaking cowl vents, R+R front frame rails, R+R front frame rail crossmember bolts IN the frame.
Glass (rear) you cant find because its not manufactured
Put in a T-5 5 speed, Opps the crossmember doesn't quite fit.
recovering seats, painting the dash after having to weld the ignition key opening to the correct size. Replacing the entire wiring harnesses. All of them, new heads, rebuild the carb, overheating problems, pertronics ignition burns out after 9 months etc,etc. $45 for CV joint to be replaced??? What CV joints? It a hard axel, Might even be an open end. And lets not forget the "exploding " gas tank, $700 for a racing fuel cell. Convert to front disk brakes with, This is an interesting idea, A dual bowl master cylinder. The safety differences between the two cars are night and day. One additional finding, I have NEVER had a bolt or nut on a Mercedes that I could not get off. In 23 years of owning them. The Mustang, The amount of rusted Items was unbelievable. The 2 most important tools in a Mustang restoration are a sawsall and a welder. We were extremely lucky. I didn't know about the cowl vent rust when we bought the Mustang. Ours were solid, but 40-50% of them require replacing the cowl vent sheet metal. 167 spot welds have to be drilled out, old sheet metal cut out and new cowl vents welded in, then the 167 spot welds button welded back. Additionally new floor pans are the #1 welding job on the car.
Go here if you want to learn about Vintage Mustangs, they are lots of work, 602,000 posts and this doesn't include the 900,000 on the old forum.
http://www.vintage-mustang.com/
Do a search on the word "rust"
I think you will see that the SL wil be more reliable in the long run. You had to buy a hard top?? All 107 SL's came with hardtops.
I know that you have been through a lot, but I own a 88 560SL and a 65 Mustang Fastback. We completely rebuilt the Mustang and we still have things go wrong with it, more than I have with the SL. Over time you will find the SL is quite reliable.
Dave
PS Keep them both, their both great cars. A luxury touring convertible and a classic Mustang, Two different worlds