[Mike C]

My opinion is I wouldn't go more than 216 degrees duration at .050, and if you had a 4 speed, 210 would be more like it.

More converter = more heat, so it could hurt the tranny depending on how much cooler you have. More important than anything else you have mentioned, is the gears that are in the truck. The smaller numerically the gear set, the smaller the .050 duration on the cam should be.

With the 4.10 gears, I would stay 210 or under with the 37" tires. If you swith to 4.56 or higher numerically, you can go bigger, but I would still try to stay under 220 in a driver.

I switched from a 228 @ .050 cam in my Jimmy (331 @ 9.5:1) to a 210 (Crane 266 which approximately = the Comp 260) and it is one of the best mods I have made as far as driveability goes and moving the power where it best matches gear ratios. I have 36" tires and 4.10 gears.