You can use a longer bolt in that hole to run a bolt in to just make contact with the fuel pump rod. Not too tight, just enough to hold the rod while you replace the fuel pump if it ever goes out cool
I would go with the 283 as they are pretty good little engines and parts are still available grin

There is enough good in the worst of us and enough bad in the best of us that it does not behoove any of us to criticize the rest of us.
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Be yourself. If you are ever lost, It will be much easier to find yourself if you know who you are!