Well, I've heard that the alda gradually leans out the mixture over the years due to the spring slowly getting less "springy". And on mine (just did it to my nice SD after testing on the beater) they would both go well once the turbo was boosting,and I did adjust the valves, checked the timing, cleaned the banjo bolt on the boost line, disconnected the boost line to see if the turbo was boosting, changed the fuel filters, cleaned the tank filter, and none of it made a noticable difference, but adjusting the alda, WOW, immediate change in the off-the-line performance. Now I'm not scared to pull out into traffic anymore!

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'84 300SD veg-oil bliss
'83 300SD veg-oil beater