I too was thinking about checking into a custom grind cam for the 235 thats in my 37,those motors are designed to run at higher RPMs then the later sixes and would like to get one in a RV or higher torque at a lower RPM grind. I have been trying to get my 235 to run good since I put taller gears in it and the gas mileage has suffered,granted I have way too tall gears and will be fixing that before any more tuning happens but would like to get the engines sweet spot at 2200 to 2400 RPMs down to around 1800.
