I had a look in both my generator welders ,one 200a the other 350a and all they had inside was a welder transformer inside running off the alternator(my old dedicated welder only set has high amp windings) so just do what the poster said above
Like said it is possible to do anything with enough money and time!!
With your stated fact that you are cheap!!!
In your case no it is not possible because of self imposed budget limits.
But since your on a low budget shop around for a few of the same vintage model engine drive welder one with a bad engine one with a bad back end(generator) marry them and your good to go for the cheap!!!!!
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