Tractor Vet, you are correct if you mean the 93 octane by the research method. The current (R+M)/2 93 octane is 100+ by the research method. I owned a 66 Plymouth 383 with 4 bbl carb. It ran on the mid grade at that time, don't remember the exact octane. Regular was too low, Super premium was not needed. That engine did not have a compression ratio as high as the Ford 390 or the GM 396. I traded that for a 1972 Chevy Monte Carlo with 454, unfortunately the first year GM dropped the compression ratio to 8:1 from 10.5:1 or so. It did not accelerate nearly as well as my 66 Plymonth, when the previous year the 396/454 would leave it in the dust. It also would ping on unleaded regular if I went from the 2800 ft altitude where I live now to the 500 ft or so where I grew up. Going to quit, this is not about tractors.
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Today's Featured Article - Trailering Your Tractor - by Curtis Von Fange. One of the fun things of summer and fall are the parades and tractor shows that go on across America. Many owners of tractors travel long distances to attend these shows and they usually take their restored iron along with them. Safe trailering practices and inspections will ensure that the event is a fun one. A good habit to develop when using a trailer is to give that �quick look over� before taking it on a trip. Before hooking up to it check the tongue for proper operation. The latche
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