A friend of my father's has a 1969 280 SL (dark green on tan) blocking space in his garage. The car needs serious (auto) transmission work (I believe quoted at something like $5k several years ago). It has been sitting for something like 20 years without running. It was running, the transmission went, and it sat in a garage thereafter. The paint is dull but could be brought back. There is rust under the rockers, but nothing scary (although this was 3 years ago when he last looked). He wants to just give it to us. We have a week to figure out if we want it. It's implicit that we would get the car going and not just flip it for profit.
We are both decent wrenches, but neither of us have a place to work on the car. As such, any significant work would need to be done by a professional shop, and would probably have to be a specialist that knows these cars inside and out. I think he could put $10k into it and have a $20k car on the other side that was pleasant to drive, but I'm just ballparking wildly after an hour of research on these things. Also, the $10k might wind up coming out of my pocket, and I don't really have a place for the car in my stable. The goal isn't to maximize profit on a sale, but I have more favorable money pits in mind than this particular car.
My immediate thought was to put a manual transmission in it, but I don't know the ins and outs of the Getrag 265 or ZF whatever. What should I expect to pay for fully swappable 5spd with all the bits? What should I expect to pay a mechanic for me to drive in with the tranny in the trunk, and drive away with the tranny pushing the car?
Is it reasonable to expect this engine to need no major work after sitting dead for so long? It sounds like it will already cost several thousand to get the motor running and the fuel system in a clean, sustainable state. Once the car is drivable, I'm sure we'll then find out how well the brakes don't work, the suspension is tired, and the alignment is way off, etc...Would it be unwise to try and got the car started/moving as-is, for the purpose of seeing what else is/isn't working on the car?
My big fear is that it will cost thousands to get the car drivable, and we may then find out that every other component on the car is failing, and suddenly the endeavor will not be fun...Any recommendations on what to look for on a non-running W113 that would cost real money to repair?