'83 spill timing is 24btdc.
Retarded timing is chain stretch or never set correctly in the first place.
The 'slow off the line' problem is the ALDA.
Remove the tamperproof case and unscrew the center screw...until it smokes slightly at wot....tighten lock nut when finished.
Spill time the pump....set to close to 23 btdc as possible and disconnect the turbo waste gate hose... and pull the electrical connector off the over boost switch.
Now run a test.
Top of i/p towards the engine is advance ...loosen the rear support too and slacken all the line nuts at the head.
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