It should be pretty easy to clean the needle seat and float by yourself. However if you want to buy a remanufactured carburettor try Tomco or Holley at O'reilly auto parts.
Many times on the 300's the bolts for the carburettor back off and creates a huge vacuum leak. Try tightening the bolts first.
The squealing noise is probably from a loose belt, try adjusting the tension on your alternator belt.
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93 Thunderbird 5.0 HO
89 Firebird L03
95 F150 XL
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