you're running a 350? if the shape of the neck will take a pressure cap [earlier zero pressure rads wouldn't] you might try a 7# and if you do have a 350, make sure you get to afford a new rad that can stand a 14# cap and then go to a 190 stat - you should likely also have a shroud

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 & Rust-a-holics Unanimous parking lot