Jim, glad you discovered the problems, and for hi-speed driving you may have to go with an OD trans or a T5.
But your original question on the max allowable sustained rpm, I have read articles, where a 51 Desoto p passenger with a 4.10 rearend was cruising at 60 to 70 mph, on long trips and also pulling a camper, through the Mojave Desert and in the Rocky Mountains. Now the owner would routinely run the engine in the 3000 to 3200 rpm range, he never cooked his engine. This article is in
www.allpar.com.Is this for real, do ya think.
Right now I have either a 4.3 or 4.1 rearend on my 47 Chrysler, 3 spd trans. Until I can get my 3.54 installed I want to take it easy, as this engine has miles on her. I hope to at least cruise at 50 to 55 mph, which is in the neighbourhood of 2700 to 2900 rpm. Should I run the engine like this or not. I am fortunate, beacuse there are a lot of small highways around here, and I can avoid the Interstate type highways.Thanx 47
