Merc 5cyl. is really strong mottor .
My dad rebuild one for his friend and his friend was stupid and did not broke it in . So he seazed up the mottor. Rods and pistons where seazed . The reason is that he stared to race a nother 300D that was newer. He was faster in his 300d untill it started to seaze up . and this was like day after the mottor was installed . After the second rebuild , my dad told him that he will not rebuild anything for him .
I would not mind sticking that 300D turbo in my Disco . Get some fast glow plugs , like my dad had in his 200D . It tuke only 2 sec. on early winter morning in Poland .
So personaly I would go with the Merc mottor
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