Very sorry to hear your cars been off the road for so long! I definitley wouldnt break your car or give up on it.
My 1993 wrx had a bad HG , at the time I had no money so used a £40 sealant from halfords (which did actually work suprisingly) and I drove it for a whole year just like that. Untill I could afford to get the HG replaced from Slowboy racing. (Job took 10 days and was booked within a week)
Personally I would just send your car to another specialist, or get a used engine and drop it in.
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