I think the 700R4 is preferable .... I've got a 700 with a stock 3.90, keeps the pulling power and gives good highway speeds at lower RPM with the OD

Bill


Moved over to the Passing Lane

"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir
"When we tug a single thing on an old truck, we find it falls off" ~ me
Some TF series details & TF heater pics