i tow a trailer with a 79 short bed pick up with a 307 3.25 frist gear trans and a 3.42 rear. lt 235/75/15 tires. and have no trouble stopping or going. the trailer has brakes on both axles per pa. law. i haul cars and trucks and tractors. back when i was younger i had a 62 with 235 low gear 4 speed and 4.10 rear and i towed race cars with it. and had no problems. but with both rigs i did not set speed records.
so i say if you keep everything in top shape you will have no problems.
