No fuel enrichment circuit (the alda) on a n/a injection pump. Do not do the injection pump change without cleaning everything out properly. Costs little but time to get the fuel up usually.

Then you can establish if you need another injection pump. While cleaning out the fuel system a good soaking of the rings and pistons with miracle mystery oil would not hurt either. Change the oil right after as you may have partially contaminated oil in the base of the engine from the vegatable oil burning.

In otherwords avoid spending much money until you find out if what you have is worth pursueing. I think in your case I might do a compression check and soaking with the miracle oil if the compression is too low before anything else.