Question for the engine experts, what are the differences between 3.5 and 4.5 with D-jet? How much interchange in parts is there between the 2 systems? Iwondering if I could use the wiring harness, computer, etc. from a 4.5 on a 3.5. Someone mentioned the 4.5 has a MAF sensor and other differences...

I have '69 3.5 in a '63 111 220SE that was converted to CIS by the previous owner. But it doesn't run right at all, and it seems likely that they used 4.5 CIS injection part. I saw a complete-looking early 450SLC (euro lights & bumpers) in a local scrap metal yard and am wondering whether I should go scavenging...

Scott