Well I am mis-remembering, must have read about the swaps on other forum.

Here's one for an OM606 into a 124 body, which shouldn't be too much different than your 126 body.

Chronicle of my OM606 swap!

__________________
Respectfully,
/s/
M. Dillon
'87 124.193 (300TD) "White Whale", ~392k miles, 3.5l IP fitted
'95 124.131 (E300) "Sapphire", 380k miles
'73 Balboa 20 "Sanctification"
Charleston SC