Date registered: Jan 2010
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Thank you so much Quicksilver
I'll answer your questions as best I can. Some people wont share the same philosphy as me but I have made my transplant work so the proof is there for all to see.
1) I chose the chevy because I knew those engines really well. In Australia there are heaps of Chevy engine parts available and they are pretty cheap. I did order some stuff from the US and it was even cheaper than getting it in some places in Australia. Mercedes cars from the late 60's through to the late 70's are cheap in Australia, but the parts are soooooooo expensive. To rebuild a Mercedes engine wasnt worth it financially for me. Mercedes injection pumps are expensive, pistons, gasket sets, rockers etc are all expensive if you go down the Mercedes route. You also need to find people with the right expertise as Mercedes engines are a little different to Ford and Chevy motors. There are heaps of people that live local to me that know about performance chevy engines so its really handy to have that wealth of expertise so close, rather than having to find a Mercedes specialist and try and get some time with them.
2) I initially mocked up the engine and trans with a turbo700R transmission which fitted into the tunnel OK without modifying the tunnel, but the valve body was a little too close to the gearbox tunnel wall so I went to a turbo 350 gearbox and that was a much better fit. If you are going down the ford route I cant give you too much advice as I dont really know the C4 and C6 transmissions too well. A C4 would probably fit but I think a C6 might be tight. I also know that a Poowerglide trans will fit without modification.
3) I have a set of mounts that I fabricated to suit the 350 chevy spare if you want to look at putting a 350 into your 108. They use the stock mercedes mounting holes on the crossmember to maintain structural integrity. If you are going to stick with the ford engine then obviously the mounts will be different to the ones I have made.
4) I didnt spend huge dollars on my build and there was no way I coukd affort the $3000 for a proper dry sump setup. You can fit a 350 chevy into the 108 and use a small corvette style starter motor to give you the clearance to the stock Mercedes steering. The only reason I changed the steering on mine was because the turbo dump pipes needed to go where the steering box was.
For the easiest, simplest install stick with the Ford motor. If you are good with fabrication, then put a chevy in it and modify the sump, or use a sump pan from a 60's chevelle - they ran a front sump bowl configuration. With either engine you will need to modify the transmission cross member, but thats an easy process - tooke me about 45 minutes to do mine. Other modifications that will need to be made are:
- the tailshaft/driveshaft will need to be modified to suit the new gearbox spline configuration
- you will need to rid yourself of the stock 6 cylinder mercedes and get yourself a V8 mercedes diff, unless you want to rev the hell out of the engine to do 40mph
- an aftermarket shifter (like a B&M shifter for example) will need to be installed to the top of the gearbox tunnel - its not a huge job, but something that will need to be done before the gearbox goes in
- you will need to do a slight modification to the wiring harness if your 108 came with an automatic gearbox from stock. Mercedes used a park/neutral safety switch and wired into it from the ignition barrel, so you will need to reroute the starter motor exciter wire otherswise your engine will never start.
Any other questions, feel free to contact me