you really need to check it, no telling what's been installed over the last 50 years - might be able to just remove the lower dust cover and get a good measure, original would have been 10", but 11" [HD option?] should fit and may be more readily available

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