As lond as its not an ignition detonation problem you probably have a spun rod bearing in the bottom end. Time for a used engine in this case. Take it to a mechanic and they should be able to listen to it and let you know without expensive diagnostics.
Yes
putting the gf performance chip in a 89 5.0 mustang
check your fuel pump and or filter
Yes the front seats from a 89 mustang v6 will fit in a 91 mustang, the tracks are the same.
counterclockwise
2.73
I figure you mean what grade of gas should I put in my cressida? Before I blew my headgasket, my 89 cress took 91 octane, anything else would cause piston knock. [detonation]
One might find parts for an '89 Mustang all over the Internet. A few of these places include Yelp, a website for a company called AmericanMuscle, and another company called Mustangs Unlimited. All three of these places would be good options for finding and purchasing parts for an '89 Mustang.
no
What all ford manual transmissions fit on a 89 mustang 5.0 gt
On my 89 LX 4cyl Mustang it is located in the passenger side front fender,,,
About 55 miles or 89 kilometres.