I used an 83 Olds 98 for a tow vehicle for a few years. We had a 20' pontoon boat at the time. I put in a new 307, replaced the transmission (200R4)and installed 3.55 gears. The car was fine at slower speeds but really struggled at higher speeds.
One time on our way to Ocean City,MD I was pushing the car a little too hard on 95 and when we got on 58 I heard the engine knocking. We drove it all the way to OC (over the Bay Bridge Tunnel) with the trailer while knocking. My parents brought a car from Frederick, MD, we left the boat in OC, they took the Olds to a Frederick dealer to have the Target Master replaced under warranty.
3 weeks later we drove back to OC in my parents car. They brought the Olds back and we hooked up. On our way towards the bridge the car started misfiring. I did not see the problem but it was getting worse. We hit the bridge with 1/2 tank of gas. The car was struggleing to make it up the bridge. It started running rich, fuel level dropping. We came out of the first tunnel up the hill at 15 mph, low fuel light came on. At the top of the tunnel we found a pull off. I dumped the boat gas into the car tank. (little background here, Labor Day, wife 7 months pregnant, hot outside, and in case you don't know the bridge tunnel is 24 miles toll booth to toll booth over the Chesapeake Bay and this was before the 2nd bridge was opened). We took off again with a WOT we limped across the bridge top speed of 35 MPH tieing traffic up. We came out of the 2nd tunnel at 15 MPH and finally could see the shore.
We found a UHaul dealer in VA Beach, rented a truck to pull the trailer, my wife drove the car. Finally it could go 55. We limped it home (alternator light on in the UHaul, go figure). In Raleigh the cars CAT started to come apart. We made it the 45 miles further home. Car shut off and would not start. It was the trip from HELL 10 years ago!!
The dealer who replaced the engine routed the plug wires wrong and at the same tine the carb screwed up. After this experience I bought the Durango with the 5.9L. My next truck will be a 2500HD Duramax. I learned my lesson not having enough of a tow vehicle.