You are talking about $4200, what kind of car can you get for that amount of money? I had a similar Volvo that went for 336,000. A fuel pump is maintenance, every car's fuel pump will fail, as does the A/C system in a hot climate or humid summer time climate , which the great State of Illinois is.
As for the Speedo, get a used Instrument panel from a wrecking yard, it will cost maybe $100, and do just as good job. Plan to spend about $1200 a year, averaged out for the life of this car. Can you live with a $100 dollar/month car payment or a $700/month car payment? It is your choice.